Retrieve schema information for all tables in the database
AI agents call all_schemas_tool to retrieve information from FastPostgresMCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves schema metadata (table definitions, columns, types, constraints) from the database. Retrieval operations with no ability to modify, delete, or execute code fall into the Read category.
From the tool's definition Tool name 'all_schemas_tool' and description 'Retrieve schema information for all tables in the database' indicate a data retrieval operation with no modifications or side effects.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
Retrieve schema information for all tables in the database. It is categorised as a Read tool in the FastPostgresMCP MCP Server, which means it retrieves data without modifying state.
Register the FastPostgres MCP server in PolicyLayer and add a rule for all_schemas_tool: 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 FastPostgresMCP. Nothing to install.
all_schemas_tool 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 all_schemas_tool 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 all_schemas_tool. 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.
all_schemas_tool is provided by the FastPostgres MCP server (llm-graph/postgres-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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