AI agents call generate_speech as a supporting operation in Gpal workflows.
The name 'generate_speech' suggests text-to-speech or audio generation, which would be a Write/Execute operation, but the description is completely empty. Given the server context (code analysis, Gemini AI), this likely generates audio output. Without a description, confidence is very low. Defaulting to Other due to insufficient information, though it could be Write if it saves audio files.
From the tool's definition Tool description is empty; no information provided about what this tool does beyond its name 'generate_speech'.
Documented attack patterns abuse exactly the kind of access generate_speech gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Gpal, and nothing reaches the server without passing your rules. This is the rule we recommend for generate_speech:
{
"version": "1",
"default": "deny",
"tools": {
"generate_speech": {
"limits": [
{
"counter": "generate_speech_rate",
"window": "minute",
"max": 60,
"scope": "grant"
}
]
}
}
}generate_speech gets a rate cap, and everything else on the server is denied unless you say otherwise.
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generate_speech. It is categorised as a Other tool in the Gpal MCP Server, which means it performs auxiliary operations.
Register the Gpal MCP server in PolicyLayer and add a rule for generate_speech: 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 Gpal. Nothing to install.
generate_speech is a Other tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the generate_speech 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 generate_speech. 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.
generate_speech is provided by the Gpal MCP server (tobert/gpal). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Gpal, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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19 Gpal tools catalogued and risk-classified — across an index of 43,000+ MCP servers.