lsp-docs

Requires the agent-lsp MCP server.

lsp-docs

Three-tier documentation lookup for any symbol. Works when the language server is unavailable, when hover returns empty results, or when the symbol lives in a transitive dependency that gopls or pyright does not index.

Read-only — does not modify any files.

Invocation: User provides symbol_name in fully-qualified form (e.g. "fmt.Println", "std::vec::Vec::new", "os.path.join"). Optionally provide file_path for any file in the same module, which improves Go package resolution.

---

Decision table

Situation	Recommended tier
Symbol in current workspace	Tier 1 (hover)
Symbol in direct dependency	Tier 2 (toolchain doc)
Symbol in transitive dep (not indexed by LSP)	Tier 2
No LSP server available	Tier 2 → Tier 3
No toolchain installed (e.g., Rust without cargo)	Tier 3

---

Tier 1 — LSP hover (fast, live, position-based)

Call inspect_symbol with the file path and cursor position (1-based).

mcp__lsp__inspect_symbol({
  "file_path": "/abs/path/to/file.go",
  "line": 42,
  "column": 8
})

If the result contains a non-empty contents field with useful type and doc information, stop here and return it. Hover is the fastest path and should always be tried first.

If hover returns empty contents, or the language server is not initialized, proceed to Tier 2.

---

Tier 2 — Offline toolchain documentation (authoritative, name-based)

Call get_symbol_documentation with the fully-qualified symbol name and language_id. This fetches documentation from the local toolchain (go doc, pydoc, cargo doc) without requiring an LSP session. Works for transitive dependencies that the language server does not index.

mcp__lsp__get_symbol_documentation({
  "symbol": "fmt.Println",
  "language_id": "go",
  "file_path": "/abs/path/to/any/file/in/the/module.go",  // optional, improves Go pkg resolution
  "format": "markdown"   // optional: wraps signature in code fence
})