AI agents call mb_get_release to retrieve information from UnClick without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
mbid | string | Yes |
Parameters from the server's own tool schema.
This tool retrieves metadata about a music release from MusicBrainz using a unique identifier (MBID). It performs a query with no capability to modify, delete, or execute operations. The blast radius of misuse is minimal—an agent could only retrieve public music metadata, which carries no security or financial risk.
From the tool's definition Tool name 'mb_get_release' and description 'Get a MusicBrainz release by MBID' indicate a retrieval operation. The verb 'Get' and the context of querying a music database by identifier are characteristic of read-only data retrieval with no side effects.
Attacks that exploit this kind of access
Get a MusicBrainz release by MBID. It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.
mb_get_release accepts 1 parameter: mbid. Required: mbid. The full parameter table on this page comes from the server's own tool schema.
Register the UnClick MCP server in PolicyLayer and add a rule for mb_get_release: 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 UnClick. Nothing to install.
mb_get_release 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 mb_get_release 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 mb_get_release. 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.
mb_get_release is provided by the UnClick MCP server (@unclick/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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