Frida MCP

Instructions

Implementation Reference

• src/frida_mcp/cli.py:341-360 (handler)

  The @mcp.tool()-decorated function that implements attaching to a process by PID using Frida's device.attach(pid). Includes inline schema via Pydantic Field and handles device resolution and errors.

  @mcp.tool()
  def attach_to_process(
      pid: int = Field(description="The ID of the process to attach to."),
      device_id: Optional[str] = Field(
          default=None,
          description="Optional ID of the device where the process is running. Uses smart selection when omitted.",
      ),
  ) -> dict:
      """Attach to a process by ID."""
      try:
          device = _resolve_device_or_raise(device_id)
          device.attach(pid)
          return {
              "pid": pid,
              "success": True,
              "is_detached": False,  # New session is not detached
          }
      except Exception as e:
          return {"success": False, "error": str(e)}