AI agents call query_music to retrieve information from Music without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool searches or queries a music database to find songs. It retrieves information without creating, modifying, deleting, or executing operations. The sibling tools (play_music, pause_music, etc.) perform actions, but query_music itself is purely informational. This is a classic Read category tool with low severity since misuse would only return unwanted search results.
From the tool's definition Tool name 'query_music' with description '搜索歌曲' (search songs) indicates a search/retrieval operation with no data modification or side effects.
Attacks that exploit this kind of access
搜索歌曲. It is categorised as a Read tool in the Music MCP Server, which means it retrieves data without modifying state.
Register the Music MCP server in PolicyLayer and add a rule for query_music: 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 Music. Nothing to install.
query_music is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the query_music 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.
Set action: deny in the PolicyLayer policy for query_music. 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.
query_music is provided by the Music MCP server (jxiufen/music-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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