get_keys_for_arrangement_of_song

THE RISK

Low Risk

Why get_keys_for_arrangement_of_song needs a policy

This tool queries and retrieves music key information for a song arrangement from the Planning Center Online API. It performs a read-only operation that does not create, modify, delete, or execute any changes to data or external systems. The function is purely informational and returns a list of available keys, making it a Read category tool with low severity risk.

From the tool's definition Tool name 'get_keys_for_arrangement_of_song' and description 'Get a list of keys available' indicates a retrieval operation with no side effects.

Documented attack patterns abuse exactly the kind of access get_keys_for_arrangement_of_song gives an agent:

POLICY

How to control get_keys_for_arrangement_of_song

PolicyLayer is an MCP gateway — it sits between your AI agents and Planning Center Online (PCO) MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_keys_for_arrangement_of_song:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_keys_for_arrangement_of_song": {}
  }
}

get_keys_for_arrangement_of_song is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Planning Center Online (PCO) MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

Related tools and policies

More Planning Center Online (PCO) MCP Server tools

Write assign_tags_to_song Assign tags to a specific song. Write create_song Create a new song in Planning Center Online. Read find_song_by_title Find songs by title. Read find_songs_by_tags Find songs that have all of the specified tags. Read get_all_arrangements_for_song Get a list of all the arrangements for a particular song from the Planning Center Online A Read get_arrangement_for_song Get information for a particular song from the Planning Center Online API. Read get_plan_items Fetch a list of items for a specific plan. Read get_plan_team_members Fetch a list of team members for a specific plan.

All 13 Planning Center Online (PCO) MCP Server tools →

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_keys_for_arrangement_of_song

What does the get_keys_for_arrangement_of_song tool do? +

Get a list of keys available for a particular song ID and arrangement ID from the Planning Center Online API. It is categorised as a Read tool in the Planning Center Online (PCO) MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_keys_for_arrangement_of_song? +

Register the Planning Center Online (PCO) MCP Server MCP server in PolicyLayer and add a rule for get_keys_for_arrangement_of_song: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Planning Center Online (PCO) MCP Server. Nothing to install.

What risk level is get_keys_for_arrangement_of_song? +

get_keys_for_arrangement_of_song is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_keys_for_arrangement_of_song? +

Yes. Add a rate_limit block to the get_keys_for_arrangement_of_song rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block get_keys_for_arrangement_of_song completely? +

Set action: deny in the PolicyLayer policy for get_keys_for_arrangement_of_song. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides get_keys_for_arrangement_of_song? +

get_keys_for_arrangement_of_song is provided by the Planning Center Online (PCO) MCP Server MCP server (jake-ccnh/pco-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Planning Center Online (PCO) MCP Server tool call.

Start from Planning Center Online (PCO) MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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