Get the list of subject matters/topics with their codes. Use these codes with search_legislation
AI agents call get_matters_table to retrieve information from Spanish Public Data MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and lists reference data (subject matter codes) from Spanish government open data APIs. It is a pure query operation that returns information for reference purposes, with no capability to modify, delete, execute code, or affect financial systems. The low severity reflects minimal blast radius - misuse would only result in unnecessary API calls or information disclosure of already-public data.
From the tool's definition Tool description states 'Get the list of subject matters/topics with their codes' - a retrieval operation with no side effects. Confirms it is used as a lookup to support search operations (passing codes to search_legislation), not modifying data.
Attacks that exploit this kind of access
Get the list of subject matters/topics with their codes. Use these codes with search_legislation. It is categorised as a Read tool in the Spanish Public Data MCP MCP Server, which means it retrieves data without modifying state.
Register the Spanish Public Data MCP server in PolicyLayer and add a rule for get_matters_table: 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 Spanish Public Data MCP. Nothing to install.
get_matters_table 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_matters_table 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_matters_table. 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_matters_table is provided by the Spanish Public Data MCP server (mjgmario/spanish-public-info-radar-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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