Analyze Nullability
analyze-nullability · Query · CorePlugin · Code analysis
Returns nullable-flow diagnostics for a selected scope or location.
Availability: Built in and published by default.
Generated from Roslyn Workbench MCP 0.1.0-beta.294 (0.1.0-beta.294).
Behaviour annotations
| Annotation | Value |
|---|---|
destructiveHint |
false |
idempotentHint |
true |
openWorldHint |
false |
readOnlyHint |
true |
title |
"Analyze Nullability" |
Request
| Property | Type | Required | Description |
|---|---|---|---|
scope |
object | null |
No | |
location |
object | null |
No | Provide exactly one of span or selection. |
findingsLimit |
integer | null |
No | |
expectedSnapshot |
object | null |
No | Echo the snapshot returned with the data or transaction state used to construct this request. |
workspace |
object | null |
No | Provide workspaceId, alias, path, or any combination. |
Response
Success response
| Property | Type | Required | Description |
|---|---|---|---|
ok |
boolean constant (true) |
Yes | Whether the tool invocation succeeded. |
data |
object | null |
Yes | Tool-specific result payload. |
snapshot |
object |
Yes | Exact immutable workspace snapshot associated with the result, when available. |
Error response
| Property | Type | Required | Description |
|---|---|---|---|
ok |
boolean constant (false) |
Yes | Whether the tool invocation succeeded. |
error |
object |
Yes | Structured error details when the invocation failed. |
continuation |
oneOf |
No | Action the agent should take before retrying or continuing. |
Bounded collections and continuation
These response locations publish returned items with explicit bounds and continuation state:
$/oneOf/0/properties/data/properties/findings
Continuations and required actions
A non-success response may include a structured continuation at the following schema location. Follow its tool call or user-action instruction instead of guessing how to retry:
$/oneOf/1/properties/continuation
Complete input schema
{
"type": "object",
"properties": {
"scope": {
"type": [
"object",
"null"
],
"properties": {
"kind": {
"type": "string",
"enum": [
"Solution",
"Project",
"Document",
"Projects"
],
"default": "Solution"
},
"project": {
"description": "Used only when kind is Project.",
"type": [
"object",
"null"
],
"properties": {
"projectId": {
"type": "string"
},
"name": {
"type": "string"
},
"path": {
"description": "Workspace-relative path.",
"type": "string"
},
"targetFramework": {
"type": "string"
}
}
},
"document": {
"description": "Used only when kind is Document.",
"type": [
"object",
"null"
],
"properties": {
"project": {
"description": "Disambiguates documents with matching paths or IDs.",
"type": [
"object",
"null"
],
"properties": {
"projectId": {
"type": "string"
},
"name": {
"type": "string"
},
"path": {
"description": "Workspace-relative path.",
"type": "string"
},
"targetFramework": {
"type": "string"
}
}
},
"path": {
"description": "Workspace-relative path.",
"type": "string"
},
"documentId": {
"description": "Workspace-local document ID.",
"type": "string"
}
}
},
"projects": {
"description": "Used only when kind is Projects.",
"type": [
"array",
"null"
],
"items": {
"description": "Provide projectId, name, path, targetFramework, or any combination.",
"type": [
"object",
"null"
],
"properties": {
"projectId": {
"type": "string"
},
"name": {
"type": "string"
},
"path": {
"description": "Workspace-relative path.",
"type": "string"
},
"targetFramework": {
"type": "string"
}
}
}
}
}
},
"location": {
"description": "Provide exactly one of span or selection.",
"type": [
"object",
"null"
],
"properties": {
"span": {
"type": "object",
"properties": {
"document": {
"description": "Provide exactly one of path or documentId.",
"type": "object",
"properties": {
"project": {
"description": "Disambiguates documents with matching paths or IDs.",
"$ref": "#/properties/scope/properties/document/properties/project"
},
"path": {
"description": "Workspace-relative path.",
"type": "string"
},
"documentId": {
"description": "Workspace-local document ID.",
"type": "string"
}
}
},
"range": {
"description": "Zero-based UTF-16 range.",
"type": "object",
"properties": {
"start": {
"description": "Zero-based UTF-16 offset.",
"type": "integer",
"minimum": 0,
"maximum": 2147483647
},
"length": {
"description": "UTF-16 code-unit length.",
"type": "integer",
"minimum": 0,
"maximum": 2147483647
}
}
}
},
"required": [
"document",
"range"
]
},
"selection": {
"type": "object",
"properties": {
"document": {
"description": "Provide exactly one of path or documentId.",
"type": "object",
"properties": {
"project": {
"description": "Disambiguates documents with matching paths or IDs.",
"$ref": "#/properties/scope/properties/document/properties/project"
},
"path": {
"description": "Workspace-relative path.",
"type": "string"
},
"documentId": {
"description": "Workspace-local document ID.",
"type": "string"
}
}
},
"selectedText": {
"type": "string",
"minLength": 1
},
"contextBefore": {
"type": [
"string",
"null"
]
},
"contextAfter": {
"type": [
"string",
"null"
]
}
},
"required": [
"document",
"selectedText"
]
}
}
},
"findingsLimit": {
"type": [
"integer",
"null"
],
"minimum": 0,
"maximum": 2147483647,
"default": 50
},
"expectedSnapshot": {
"type": [
"object",
"null"
],
"properties": {
"workspaceId": {
"type": "string",
"format": "uuid"
},
"workspaceEpoch": {
"type": "integer"
},
"snapshotId": {
"type": "string",
"format": "uuid"
},
"transactionRevision": {
"type": [
"integer",
"null"
]
}
},
"required": [
"workspaceId",
"workspaceEpoch",
"snapshotId",
"transactionRevision"
],
"description": "Echo the snapshot returned with the data or transaction state used to construct this request."
},
"workspace": {
"description": "Provide workspaceId, alias, path, or any combination.",
"type": [
"object",
"null"
],
"properties": {
"workspaceId": {
"type": "string",
"format": "uuid"
},
"alias": {
"type": "string"
},
"path": {
"description": "Absolute workspace path.",
"type": "string"
}
}
}
}
}
Complete output schema
{
"type": "object",
"oneOf": [
{
"type": "object",
"required": [
"ok",
"data",
"snapshot"
],
"properties": {
"ok": {
"const": true,
"description": "Whether the tool invocation succeeded."
},
"data": {
"type": [
"object",
"null"
],
"properties": {
"findings": {
"description": "The returned findings.",
"type": "object",
"properties": {
"items": {
"description": "Items returned in this page.",
"type": [
"array",
"null"
],
"items": {
"type": "object",
"properties": {
"diagnostic": {
"description": "The projected diagnostic.",
"type": [
"object",
"null"
],
"properties": {
"id": {
"description": "The diagnostic identifier.",
"type": "string"
},
"severity": {
"description": "The diagnostic severity.",
"type": "string",
"enum": [
"Hidden",
"Info",
"Warning",
"Error"
]
},
"message": {
"description": "The diagnostic message.",
"type": "string"
},
"location": {
"description": "The optional source location of the diagnostic.",
"type": [
"object",
"null"
],
"properties": {
"document": {
"description": "The resolved document.",
"type": [
"object",
"null"
],
"properties": {
"documentId": {
"description": "The document identifier.",
"type": "string"
},
"path": {
"description": "The normalized document path.",
"type": "string"
},
"projectId": {
"description": "The owning project identifier.",
"type": "string"
}
},
"required": [
"documentId",
"path",
"projectId"
]
},
"span": {
"description": "The resolved text span.",
"type": [
"object",
"null"
],
"properties": {
"start": {
"description": "Zero-based UTF-16 offset.",
"type": "integer",
"minimum": 0,
"maximum": 2147483647
},
"length": {
"description": "UTF-16 code-unit length.",
"type": "integer",
"minimum": 0,
"maximum": 2147483647
}
}
},
"line": {
"description": "The one-based line number.",
"type": "integer"
},
"column": {
"description": "The one-based column number.",
"type": "integer"
},
"snapshot": {
"description": "The exact immutable workspace snapshot associated with this location.",
"type": "object",
"properties": {
"workspaceId": {
"type": "string",
"format": "uuid"
},
"workspaceEpoch": {
"type": "integer"
},
"snapshotId": {
"type": "string",
"format": "uuid"
},
"transactionRevision": {
"type": [
"integer",
"null"
]
}
},
"required": [
"workspaceId",
"workspaceEpoch",
"snapshotId",
"transactionRevision"
]
},
"selector": {
"description": "The canonical selector that can resolve this source location again.",
"type": [
"object",
"null"
],
"properties": {
"span": {
"type": "object",
"properties": {
"document": {
"description": "Provide exactly one of path or documentId.",
"type": "object",
"properties": {
"project": {
"description": "Disambiguates documents with matching paths or IDs.",
"type": [
"object",
"null"
],
"properties": {
"projectId": {
"type": [
"string",
"null"
]
},
"name": {
"type": [
"string",
"null"
]
},
"path": {
"description": "Workspace-relative path.",
"type": [
"string",
"null"
]
},
"targetFramework": {
"type": [
"string",
"null"
]
}
}
},
"path": {
"description": "Workspace-relative path.",
"type": [
"string",
"null"
]
},
"documentId": {
"description": "Workspace-local document ID.",
"type": [
"string",
"null"
]
}
}
},
"range": {
"description": "Zero-based UTF-16 range.",
"type": "object",
"properties": {
"start": {
"description": "Zero-based UTF-16 offset.",
"type": "integer",
"minimum": 0,
"maximum": 2147483647
},
"length": {
"description": "UTF-16 code-unit length.",
"type": "integer",
"minimum": 0,
"maximum": 2147483647
}
}
}
},
"required": [
"document",
"range"
]
}
},
"required": [
"span"
]
}
},
"required": [
"snapshot"
]
}
},
"required": [
"id",
"message"
]
}
}
}
},
"hasMore": {
"description": "Whether additional items were available beyond this page.",
"type": "boolean"
},
"totalCount": {
"description": "Complete result count, when available without additional expensive work.",
"type": [
"integer",
"null"
]
}
}
}
},
"description": "Tool-specific result payload."
},
"snapshot": {
"type": "object",
"properties": {
"workspaceId": {
"type": "string",
"format": "uuid"
},
"workspaceEpoch": {
"type": "integer"
},
"snapshotId": {
"type": "string",
"format": "uuid"
},
"transactionRevision": {
"type": [
"integer",
"null"
]
}
},
"required": [
"workspaceId",
"workspaceEpoch",
"snapshotId",
"transactionRevision"
],
"description": "Exact immutable workspace snapshot associated with the result, when available."
}
}
},
{
"type": "object",
"required": [
"ok",
"error"
],
"properties": {
"ok": {
"const": false,
"description": "Whether the tool invocation succeeded."
},
"error": {
"type": "object",
"properties": {
"code": {
"description": "Stable machine-readable error code.",
"type": "string"
},
"message": {
"description": "Human-readable explanation of the failure.",
"type": "string"
},
"correlationId": {
"description": "Correlation identifier for matching the failure to server-side diagnostics, when available.",
"type": [
"string",
"null"
]
}
},
"required": [
"code",
"message"
],
"description": "Structured error details when the invocation failed."
},
"continuation": {
"oneOf": [
{
"type": "object",
"additionalProperties": false,
"required": [
"kind",
"tool",
"instruction"
],
"properties": {
"kind": {
"const": "CallTool",
"description": "Action required before the original request can continue."
},
"instruction": {
"type": "string",
"description": "Agent-facing instruction explaining how to continue.",
"minLength": 1
},
"tool": {
"type": "string",
"description": "Tool to call before continuing the original request.",
"minLength": 1
}
}
},
{
"type": "object",
"additionalProperties": false,
"required": [
"kind",
"tools",
"instruction"
],
"properties": {
"kind": {
"const": "ChooseTool",
"description": "Action required before the original request can continue."
},
"instruction": {
"type": "string",
"description": "Agent-facing instruction explaining how to continue.",
"minLength": 1
},
"tools": {
"type": "array",
"description": "Allowed tool choices from which the agent must select one.",
"minItems": 1,
"uniqueItems": true,
"items": {
"type": "string",
"description": "Name of a tool the agent may choose.",
"minLength": 1
}
}
}
},
{
"type": "object",
"additionalProperties": false,
"required": [
"kind",
"instruction"
],
"properties": {
"kind": {
"const": "RetryRequest",
"description": "Action required before the original request can continue."
},
"instruction": {
"type": "string",
"description": "Agent-facing instruction explaining how to continue.",
"minLength": 1
}
}
},
{
"type": "object",
"additionalProperties": false,
"required": [
"kind",
"instruction"
],
"properties": {
"kind": {
"const": "ReviseRequest",
"description": "Action required before the original request can continue."
},
"instruction": {
"type": "string",
"description": "Agent-facing instruction explaining how to continue.",
"minLength": 1
}
}
},
{
"type": "object",
"additionalProperties": false,
"required": [
"kind",
"instruction"
],
"properties": {
"kind": {
"const": "ResolveExternally",
"description": "Action required before the original request can continue."
},
"instruction": {
"type": "string",
"description": "Agent-facing instruction explaining how to continue.",
"minLength": 1
}
}
}
],
"description": "Action the agent should take before retrying or continuing."
}
}
}
]
}