spix_phone_bind

Instructions

Implementation Reference

• src/spix_mcp/registry.py:443-457 (schema)

  The CommandSchema definition for 'phone.bind' - this is the schema that defines the 'spix_phone_bind' tool. It maps to POST /phone/numbers/{number}/bind, binds a phone number to a playbook, with positional arg 'number' and param 'playbook_id'.

  CommandSchema(
      path="phone.bind",
      cli_usage="spix phone bind <number> --playbook <id>",
      http_method="POST",
      api_endpoint="/phone/numbers/{number}/bind",
      mcp_expose="tool",
      mcp_profile="safe",
      description="Bind phone number to playbook",
      positional_args=[
          CommandParam("number", "string", required=True, description="Phone number (E.164)"),
      ],
      params=[
          CommandParam("playbook_id", "string", required=True, description="Playbook ID to bind"),
      ],
  ),

• src/spix_mcp/server.py:84-97 (registration)

  Tool registration in the MCP server. The path 'phone.bind' is converted to tool name 'spix_phone_bind' (line 90: tool_name = f"spix_{schema.path.replace('.', '_')}") and registered via the Tool schema.

  # ─── Tool Surface ─────────────────────────────────────────────────────────
  tool_schemas = get_mcp_tools(profile=tool_profile, disabled=disabled_tools)
  tool_defs: list[Tool] = []
  
  for schema in tool_schemas:
      # Convert path to tool name: playbook.create -> spix_playbook_create
      tool_name = f"spix_{schema.path.replace('.', '_')}"
      tool_defs.append(
          Tool(
              name=tool_name,
              description=schema.description or f"Spix {schema.path}",
              inputSchema=build_json_schema(schema),
          )
      )

• src/spix_mcp/tools.py:94-203 (handler)

  The generic tool handler (create_tool_handler) that dispatches all MCP tool calls including 'spix_phone_bind'. It resolves the tool name via get_schema_by_tool_name, validates session scope, builds the endpoint URL by substituting path params, and calls the backend API.

  async def create_tool_handler(
      session: McpSessionContext,
      tool_name: str,
      arguments: dict,
  ) -> list:
      """Execute an MCP tool call by dispatching to the backend API.
  
      This function:
      1. Resolves the tool name to a command schema
      2. Validates session scope (playbook access, channel access)
      3. Builds the API request
      4. Dispatches to the backend
      5. Returns the response as MCP TextContent
  
      Args:
          session: The MCP session context for scope validation.
          tool_name: The MCP tool name (e.g., "spix_playbook_create").
          arguments: The tool arguments from the MCP client.
  
      Returns:
          List containing a single TextContent with the JSON response.
      """
      # Import here to avoid circular imports and handle missing mcp package
      try:
          from mcp.types import TextContent
      except ImportError:
          # Fallback for when mcp is not installed
          class TextContent:  # type: ignore[no-redef]
              def __init__(self, type: str, text: str) -> None:
                  self.type = type
                  self.text = text
  
      # Resolve tool name to schema
      schema = get_schema_by_tool_name(tool_name)
      if not schema:
          return [
              TextContent(
                  type="text",
                  text=orjson.dumps(
                      {"ok": False, "error": {"code": "unknown_tool", "message": f"Unknown tool: {tool_name}"}}
                  ).decode(),
              )
          ]
  
      # Validate tool access (not disabled)
      try:
          session.validate_tool_access(schema.path)
      except Exception as e:
          from spix_mcp.session import McpScopeError
  
          if isinstance(e, McpScopeError):
              return [TextContent(type="text", text=orjson.dumps({"ok": False, "error": e.to_dict()}).decode())]
          raise
  
      # Validate channel access if applicable
      channel = infer_channel_from_tool(schema.path)
      if channel:
          try:
              session.validate_channel_access(channel)
          except Exception as e:
              from spix_mcp.session import McpScopeError
  
              if isinstance(e, McpScopeError):
                  return [TextContent(type="text", text=orjson.dumps({"ok": False, "error": e.to_dict()}).decode())]
              raise
  
      # Handle playbook_id: validate and apply default
      playbook_id = arguments.get("playbook_id")
      try:
          effective_playbook = session.validate_playbook_access(playbook_id)
          if effective_playbook and not playbook_id:
              # Apply default playbook
              arguments["playbook_id"] = effective_playbook
      except Exception as e:
          from spix_mcp.session import McpScopeError
  
          if isinstance(e, McpScopeError):
              return [TextContent(type="text", text=orjson.dumps({"ok": False, "error": e.to_dict()}).decode())]
          raise
  
      # Build endpoint URL with path parameters
      endpoint, remaining_args = build_endpoint_url(schema, arguments)
  
      # Dispatch to backend API
      client = session.client
      method = schema.http_method.lower()
  
      if method == "get":
          response = await asyncio.to_thread(client.get, endpoint, params=remaining_args if remaining_args else None)
      elif method == "post":
          response = await asyncio.to_thread(client.post, endpoint, json=remaining_args if remaining_args else None)
      elif method == "patch":
          response = await asyncio.to_thread(client.patch, endpoint, json=remaining_args if remaining_args else None)
      elif method == "delete":
          response = await asyncio.to_thread(client.delete, endpoint, params=remaining_args if remaining_args else None)
      else:
          response = await asyncio.to_thread(client.get, endpoint)
  
      # Build response envelope
      envelope: dict = {"ok": response.ok, "meta": response.meta}
      if response.ok:
          envelope["data"] = response.data
          if response.pagination:
              envelope["pagination"] = response.pagination
          if response.warnings:
              envelope["warnings"] = response.warnings
      else:
          envelope["error"] = response.error
  
      return [TextContent(type="text", text=orjson.dumps(envelope).decode())]

• src/spix_mcp/tools.py:23-50 (helper)

  The get_schema_by_tool_name function that resolves 'spix_phone_bind' by stripping the 'spix_' prefix and matching 'phone_bind' → 'phone.bind' against the command registry.

  def get_schema_by_tool_name(tool_name: str) -> CommandSchema | None:
      """Look up a CommandSchema by MCP tool name.
  
      MCP tool names follow the pattern: spix_{path with dots replaced by underscores}
      e.g., "spix_playbook_create" -> "playbook.create"
  
      Args:
          tool_name: The MCP tool name (e.g., "spix_playbook_create").
  
      Returns:
          The matching CommandSchema, or None if not found.
      """
      # Remove the spix_ prefix
      if not tool_name.startswith("spix_"):
          return None
  
      path_part = tool_name[len("spix_") :]
  
      # Convert underscores back to dots for path lookup
      # We need to handle multi-part paths like "billing_credits_history" -> "billing.credits.history"
      # Try different dot positions to find the right one
      for cmd in COMMAND_REGISTRY:
          # Convert the command path to expected tool name format
          expected_tool = cmd.path.replace(".", "_")
          if expected_tool == path_part:
              return cmd
  
      return None

• src/spix_mcp/tools.py:53-73 (helper)

  The build_endpoint_url function that substitutes the 'number' positional arg into the API endpoint '/phone/numbers/{number}/bind' for the spix_phone_bind tool call.

  def build_endpoint_url(schema: CommandSchema, arguments: dict) -> tuple[str, dict]:
      """Build the API endpoint URL with path parameters substituted.
  
      Args:
          schema: The command schema.
          arguments: The tool arguments.
  
      Returns:
          Tuple of (endpoint_url, remaining_arguments).
          Path parameters are removed from arguments and substituted into the URL.
      """
      endpoint = schema.api_endpoint
      remaining_args = dict(arguments)
  
      # Substitute path parameters
      for param in schema.positional_args:
          placeholder = f"{{{param.name}}}"
          if placeholder in endpoint and param.name in remaining_args:
              endpoint = endpoint.replace(placeholder, str(remaining_args.pop(param.name)))
  
      return endpoint, remaining_args