List publishers/organizations in datos.gob.es (government agencies that publish datasets).
AI agents call list_open_data_publishers 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 enumerates metadata about public data publishers from a government catalog (datos.gob.es). It has no side effects, does not execute code or commands, does not modify or delete data, and does not involve financial transactions. The blast radius of misuse is minimal—an agent could only enumerate publicly available publisher information, causing no harm.
From the tool's definition Tool description states 'List publishers/organizations' — a retrieval/query operation with no modification or deletion of data. The verb 'list' is a classic read-only action.
Attacks that exploit this kind of access
List publishers/organizations in datos.gob.es (government agencies that publish datasets). 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 list_open_data_publishers: 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.
list_open_data_publishers 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 list_open_data_publishers 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 list_open_data_publishers. 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.
list_open_data_publishers 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.
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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