filter_by_genre
List URIs of your saved tracks or albums whose artists carry a given genre tag (case-insensitive tag-name match against your sidecar). Output is directly usable as create_playlist / add_to_playlist input. Read-only.
This record as markdown: /tools/novalux12-spotify-mcp/filter-by-genre.md
What filter_by_genre does on Spotify
AI agents call filter_by_genre to retrieve information from Spotify without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why filter_by_genre is rated Low
Retrieves and filters user's saved music metadata by genre without modifying data or executing external operations.
From the tool's definition List URIs of your saved tracks or albums. Read-only.
Attacks that exploit this kind of access
The rule that runs filter_by_genre safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Spotify, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For filter_by_genre, this is the rule to start with:
filter_by_genre is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Spotify, apply this rule, and every filter_by_genre call is checked against it from then on.
Questions about filter_by_genre
List URIs of your saved tracks or albums whose artists carry a given genre tag (case-insensitive tag-name match against your sidecar). Output is directly usable as create_playlist / add_to_playlist input. Read-only. It is categorised as a Read tool in the Spotify MCP Server, which means it retrieves data without modifying state.
Register the Spotify MCP server in PolicyLayer and add a rule for filter_by_genre: 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 Spotify. Nothing to install.
filter_by_genre 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 filter_by_genre 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 filter_by_genre. 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.
filter_by_genre is provided by the Spotify MCP server (@novalux12/spotify-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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