list_tables
AI agents call list_tables to retrieve information from Recife Open Data without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or queries data (table metadata) with no side effects. It is a classic schema exploration function that does not modify, execute, or delete anything. The description is empty, but the name and sibling tools (describe_table, search_schema, list_databases) all indicate read-only exploratory functionality.
From the tool's definition Tool name 'list_tables' indicates it retrieves metadata about available tables. The server context shows it is querying public open data from Recife, Brazil, and this tool is a schema exploration utility alongside 'describe_table' and 'search_schema', which…
Attacks that exploit this kind of access
list_tables. It is categorised as a Read tool in the Recife Open Data MCP Server, which means it retrieves data without modifying state.
Register the Recife Open Data MCP server in PolicyLayer and add a rule for list_tables: 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 Recife Open Data. Nothing to install.
list_tables 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_tables 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_tables. 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_tables is provided by the Recife Open Data MCP server (jg-cordeiro/recife-open-data-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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