AI agents call find_lyrics to retrieve information from Mr Magic without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries lyrics data across multiple providers (LRCLIB, Genius, Musixmatch, Melon) and returns the best match. It retrieves and resolves information without creating, modifying, or deleting data. The 'prefers synced when available' clause is a search preference, not a mutating operation. Misuse would yield incorrect or unintended lyrics matches, with minimal blast radius.
From the tool's definition Tool description states it 'Find[s] the best lyric match' and 'resolve[s]' provider references. These are retrieval operations with no side effects. Sibling tools like 'search_lyrics' and 'search_provider' confirm the server's read-only query pattern.
Attacks that exploit this kind of access
Find the best lyric match across providers (prefers synced when available), or resolve an exact provider reference returned by the MCP search tools. It is categorised as a Read tool in the Mr Magic MCP Server, which means it retrieves data without modifying state.
Register the Mr Magic MCP server in PolicyLayer and add a rule for find_lyrics: 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 Mr Magic. Nothing to install.
find_lyrics 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 find_lyrics 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 find_lyrics. 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.
find_lyrics is provided by the Mr Magic MCP server (mr-magic-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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