AI agents call get_meta to retrieve information from Openar without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves metadata/enumeration data for filtering purposes only. It has no capability to modify, delete, or execute operations. The blast radius of misuse is minimal—an agent could only access publicly available filter metadata. Consistent with the sibling 'get_*' and 'list_*' tools on this Parliament data server, all of which are read-only data retrieval operations.
From the tool's definition Tool name 'get_meta' and description 'Get available filter values' indicate a read-only query operation that retrieves metadata about legislative filter options (legislaturas, grupos parlamentares, tipos de iniciativa) with no modification or side effects.
Attacks that exploit this kind of access
Get available filter values: legislaturas, grupos parlamentares, tipos de iniciativa. It is categorised as a Read tool in the Openar MCP Server, which means it retrieves data without modifying state.
Register the Openar MCP server in PolicyLayer and add a rule for get_meta: 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 Openar. Nothing to install.
get_meta 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 get_meta 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 get_meta. 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.
get_meta is provided by the Openar MCP server (openar-pt/mcp). 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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