MCP Tools

MCP (Model Context Protocol) tools

Invoked as: ListMcpResources
Source directory: claude-code-main/tools/ListMcpResourcesTool/
Class: MCP
Side effect: Read-only
Gating: Always
Documented in public docs?: Yes — https://code.claude.com/docs/en/mcp (under “Resources”)
Description: “Lists resources exposed by connected MCP servers.” Resources are named documents or tools published by MCP servers; this tool enumerates what’s available without fetching their full content.
Input parameters:
- server (string, optional) — Specific MCP server name to query; omit to list from all connected servers
Returns: List of resources with names, types, and descriptions.
Notes: Use before calling ReadMcpResource to discover what’s available. Resources are exposed by MCP servers configured in .mcp.json or settings.json under mcpServers.

Invoked as: ReadMcpResource
Source directory: claude-code-main/tools/ReadMcpResourceTool/
Class: MCP
Side effect: Read-only
Gating: Always
Documented in public docs?: Yes — https://code.claude.com/docs/en/tools-reference (listed as ReadMcpResourceTool)
Description: “Reads a specific MCP resource by URI.” Fetches the full content of a named resource from an MCP server.
Input parameters:
- uri (string, required) — Fully-qualified resource URI (e.g., resource://server-name/resource-name)
Returns: Resource content (text, structured data, or file content).
Notes: URI format is resource://server-name/resource-name. Use ListMcpResources first to discover available URIs.