Returns a machine-readable JSON reference of all valid Google Photos search filter options, constraints, and examples. No arguments needed. Use this before constructing search_media_by_filter queries.
AI agents call describe_filter_capabilities to retrieve information from Google Photos MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries metadata about available search filters—it does not modify, delete, or execute external operations. It is purely informational and read-only. The low severity reflects that misuse poses minimal risk: an agent could at worst enumerate filter options, which poses no security or safety concern.
From the tool's definition Tool name 'describe_filter_capabilities' and description indicate it 'Returns a machine-readable JSON reference' of search filter options.
Documented attack patterns abuse exactly the kind of access describe_filter_capabilities gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Google Photos MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for describe_filter_capabilities:
{
"version": "1",
"default": "deny",
"tools": {
"describe_filter_capabilities": {}
}
}describe_filter_capabilities is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Returns a machine-readable JSON reference of all valid Google Photos search filter options, constraints, and examples. No arguments needed. Use this before constructing search_media_by_filter queries. It is categorised as a Read tool in the Google Photos MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Google Photos MCP Server MCP server in PolicyLayer and add a rule for describe_filter_capabilities: 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 Google Photos MCP Server. Nothing to install.
describe_filter_capabilities 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 describe_filter_capabilities 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 describe_filter_capabilities. 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.
describe_filter_capabilities is provided by the Google Photos MCP Server MCP server (savethepolarbears/google-photos-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Google Photos MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
19 Google Photos MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.