Get schema definition by reference
AI agents call get_schema to retrieve information from Swagger Mcp Tool without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves structured data (schema definitions) from static documentation sources. It has no side effects, does not modify data, does not execute arbitrary code or commands, and does not involve financial transactions. It is a straightforward read operation analogous to fetching or querying documentation.
From the tool's definition The tool 'get_schema' retrieves schema definitions by reference from Swagger/OpenAPI documentation. The description explicitly states it 'Get[s] schema definition' with no indication of modification, deletion, or execution capabilities.
Attacks that exploit this kind of access
Get schema definition by reference. It is categorised as a Read tool in the Swagger Mcp Tool MCP Server, which means it retrieves data without modifying state.
Register the Swagger Mcp Tool MCP server in PolicyLayer and add a rule for get_schema: 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 Swagger Mcp Tool. Nothing to install.
get_schema 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_schema 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_schema. 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_schema is provided by the Swagger Mcp Tool MCP server (sdlbp/swagger-mcp-tool). 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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