schema_definitions
AI agents call schema_definitions to retrieve information from MCP-Python without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Based on the tool name alone, 'schema_definitions' most likely reads/retrieves schema metadata such as table structures, column types, and constraints from the database. This is a Read operation with no side effects. However, confidence is lowered due to the empty description — the tool could potentially execute underlying INFORMATION_SCHEMA queries or expose sensitive structural data.
From the tool's definition Tool name 'schema_definitions' suggests retrieval of database schema information (table structures, column definitions, etc.). Description is empty and uninformative.
Attacks that exploit this kind of access
schema_definitions. It is categorised as a Read tool in the MCP-Python MCP Server, which means it retrieves data without modifying state.
Register the MCP-Python MCP server in PolicyLayer and add a rule for schema_definitions: 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 MCP-Python. Nothing to install.
schema_definitions 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 schema_definitions 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 schema_definitions. 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.
schema_definitions is provided by the MCP-Python MCP server (rhabraken/mcp-python). 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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