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Roslyn Workbench MCP

Tool reference

lantean-code/roslyn-workbench-mcp

Tool reference

This reference is generated from the production Host composition for 0.1.0-beta.294. The catalog is the compact machine-readable index; each tool page links to its complete MCP definition.

Code Actions

Tool	Operation	Area	Purpose
`list-code-actions`	Query	CodeAction	Lists bounded Roslyn code fixes and refactorings for a document, selection or caret.
`prepare-fix-all`	Query	CodeAction	Revalidates a Code Fix and reports the bounded impact of one explicit Fix All scope without staging changes.
`stage-code-action`	Mutation	CodeAction	Revalidates and stages one selected Code Fix, refactoring or prepared Fix All action into the active transaction.

Code analysis

Tool	Operation	Area	Purpose
`analyze-async`	Query	CorePlugin	Returns bundled AsyncFixer diagnostics and compiler diagnostic CS4014 for a selected scope.
`analyze-control-flow`	Query	CorePlugin	Analyzes control flow for an exact complete statement or contiguous statement range.
`analyze-data-flow`	Query	CorePlugin	Analyzes data flow for an exact expression, complete statement, or contiguous statement range.
`analyze-disposables`	Query	CorePlugin	Returns advisory findings for undisposed local disposable values.
`analyze-nullability`	Query	CorePlugin	Returns nullable-flow diagnostics for a selected scope or location.
`find-dependency-cycles`	Query	CorePlugin	Returns detected dependency cycles for the selected scope and granularity.
`find-duplicate-code`	Query	CorePlugin	Returns bounded duplicate executable-block pointers that normalize to the same statement sequence.
`find-unused-symbols`	Query	CorePlugin	Returns candidate unused locals and members from compiler diagnostics.
`get-change-impact`	Query	CorePlugin	Returns a bounded impact summary and supporting source locations for a symbol change.
`get-control-flow-graph`	Query	CorePlugin	Returns a bounded control-flow graph with operation metadata and exact source pointers.
`get-dependency-graph`	Query	CorePlugin	Returns a bounded dependency graph for the selected scope and granularity.
`get-diagnostics`	Query	CorePlugin	Returns compiler and analyzer diagnostics for a selected scope.
`get-document-options`	Query	CorePlugin	Returns language and optional detailed parse and analyzer-config options for a document.
`get-operation-tree`	Query	CorePlugin	Returns a bounded IOperation tree with metadata and exact source pointers.
`get-symbol-dependencies`	Query	CorePlugin	Returns the direct symbols used by a resolved symbol.
`get-symbol-dependents`	Query	CorePlugin	Returns symbols that directly depend on a resolved symbol.
`get-test-impact`	Query	CorePlugin	Returns likely impacted tests for a resolved symbol.

Tool	Operation	Area	Purpose
`find-callees`	Query	CorePlugin	Returns symbols directly invoked by a method or selected executable body.
`find-callers`	Query	CorePlugin	Returns bounded direct source call sites and containing symbols.
`find-derived-types`	Query	CorePlugin	Finds derived types for a resolved base type.
`find-implementations`	Query	CorePlugin	Finds implementations of an interface or abstract member.
`find-overloads`	Query	CorePlugin	Returns overload signatures for a resolved method or constructor.
`find-overrides`	Query	CorePlugin	Finds overrides of a virtual or abstract member.
`find-references`	Query	CorePlugin	Finds source references, optionally including declarations and access classification.
`get-api-surface`	Query	CorePlugin	Returns exported API symbols for a selected scope.
`get-code-context`	Query	CorePlugin	Returns a bounded code window with the enclosing semantic context for a selected location.
`get-document-outline`	Query	CorePlugin	Returns a bounded semantic outline for one document.
`get-partial-declarations`	Query	CorePlugin	Returns the declarations for a partial type or method.
`get-project-details`	Query	CorePlugin	Returns project metadata, options and selected document details.
`get-solution-structure`	Query	CorePlugin	Returns bounded solution folders, projects, target frameworks and direct project relationships.
`get-symbol-attributes`	Query	CorePlugin	Returns declared and inherited attributes for a resolved symbol.
`get-symbol-info`	Query	CorePlugin	Returns detailed metadata for a resolved symbol.
`get-symbol-members`	Query	CorePlugin	Lists declared members and optional inherited or interface members for a resolved symbol.
`get-type-hierarchy`	Query	CorePlugin	Returns base, interface, and optional derived type relationships for a resolved type.
`go-to-definition`	Query	CorePlugin	Finds source or metadata definitions for a resolved symbol.
`resolve-symbol`	Query	CorePlugin	Resolves the symbol at a location or selection and returns its canonical selector.
`search-symbols`	Query	CorePlugin	Searches declarations by name, metadata name and optional semantic filters.

Code mutation

Tool	Operation	Area	Purpose
`format-document`	Mutation	CorePlugin	Stages Roslyn formatting for one document or one selected range.
`rename-symbol`	Mutation	CorePlugin	Stages a symbol rename across the effective solution.

Error reporting

Tool	Operation	Area	Purpose
`get-error-details`	Query	Server	Returns temporary local diagnostic details for an unexpected tool failure. The result may contain paths and user-authored identifiers, is intended only for the trusted local agent, and must never be submitted externally.
`prepare-error-report`	Query	Server	Creates the complete external payload without network activity. Exception messages may contain Workspace data. Present the returned destination, payload JSON string and digest to the user before calling submit-error-report when approval is required; the user can choose to remove exception messages during submission.
`submit-error-report`	Mutation	Server	After applying the configured consent policy, submits one previously prepared immutable external error report to its reviewed destination.

Server lifecycle

Tool	Operation	Area	Purpose
`server-status`	Query	Server	Returns server diagnostics without requiring a loaded workspace.

Transactions

Tool	Operation	Area	Purpose
`transaction-commit`	Mutation	Server	Commits the current staged transaction to disk.
`transaction-history`	Mutation	Server	Moves backward or forward through staged transaction history.
`transaction-preview`	Query	Server	Previews the current staged transaction.
`transaction-rollback`	Mutation	Server	Rolls back the current staged transaction.
`transaction-start`	Mutation	Server	Starts a new staged transaction. Check workspace-status first and do not mutate a workspace that is or may be in use elsewhere unless mutation ownership has been coordinated.

Workspaces

Tool	Operation	Area	Purpose
`workspace-close`	Mutation	Server	Closes the selected workspace.
`workspace-list`	Query	Server	Lists the currently loaded workspaces.
`workspace-open`	Mutation	Server	Loads an additional writable workspace. Open only a fully trusted workspace: loading evaluates MSBuild project logic, evaluated source inputs including external linked or package-provided documents become queryable, and later diagnostic or Code Action operations can load and execute project analyzers with the Host's permissions. Documents outside workspaceRoot remain read-only. If instance status reports that the workspace is or may be in use elsewhere, use it only for necessary queries, expect results to become stale, and coordinate mutation ownership before starting a transaction.
`workspace-reload`	Mutation	Server	Reloads the selected workspace when it is out of date.
`workspace-status`	Query	Server	Reports the selected workspace lifecycle and cross-instance state. Treat a workspace that is or may be in use elsewhere as query-only, use it only when necessary, and expect results to become stale.