AI agents call classify_mood to retrieve information from Claud-Ear without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and analyzes metadata/properties of audio files to classify emotional characteristics. It performs semantic analysis (per server description) on audio content but does not create, modify, delete, or execute arbitrary operations. No side effects or state changes occur. This is a read-only analytical capability with minimal security risk.
From the tool's definition Tool name 'classify_mood' and description 'Detect the mood and emotional character of an audio file' indicate analysis and classification of existing audio data without modification, deletion, or external execution.
Attacks that exploit this kind of access
Detect the mood and emotional character of an audio file. It is categorised as a Read tool in the Claud-Ear MCP Server, which means it retrieves data without modifying state.
Register the Claud-Ear MCP server in PolicyLayer and add a rule for classify_mood: 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 Claud-Ear. Nothing to install.
classify_mood 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 classify_mood 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 classify_mood. 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.
classify_mood is provided by the Claud-Ear MCP server (null-phnix/claud-ear). 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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