Command
Data
Command
/add-tool
Add a new MCP tool to server.py
Install
> /plugin marketplace add astronomer/agents > /plugin install astronomer-data@astronomer
How it fires
How this command gets triggered: by you, by Claude, or both.
- Fires itselfClaude auto-loads it when your prompt matches the work.
- You can call itInvoke it directly when you want it.
- Slash command
/add-tool
Context preview
What this command does when you run it.
Add a new MCP tool to server.py
Command definition
add-tool.mddescription: Add a new MCP tool to server.py argument-hint: [tool-name]
Add a new MCP tool named `$ARGUMENTS` to `src/astro_airflow_mcp/server.py`.
Steps
1. If the tool needs a new adapter method, run `/add-adapter-method` first.
2. Create internal `_impl` function that calls the adapter:
def _tool_name_impl(param: str) -> str:
"""Internal implementation."""
try:
adapter = _get_adapter()
data = adapter.method_name(param)
return json.dumps(data, indent=2)
except Exception as e:
return str(e)3. Create the MCP tool with descriptive docstring:
@mcp.tool()
def tool_name(param: str) -> str:
"""One-line description.
Use this tool when the user asks about:
- "Example query 1"
- "Example query 2"
Args:
param: Description
Returns:
JSON with response data
"""
return _tool_name_impl(param=param)4. Add the tool to README.md tools table.
Ships withastronomer-data
AI agent tooling for data engineering workflows. Includes an MCP server for Airflow, a CLI tool (af) for interacting with Airflow from your terminal, and skills that extend AI coding agents with specialized capabilities for working with Airflow and data
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