For each Route matching the filter, walk ACCESSES edges from the consumer files that FETCH this route and compare accessed property names against Route.responseKeys. Returns MATCH / MISMATCH / PARTIAL per consumer. Read-only.
AI agents call shape_check to retrieve information from OpenCodeHub MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool walks edges and compares data for analysis purposes only. No data creation, modification, deletion, code execution, or financial operations are possible. The explicit 'Read-only' designation confirms this is a query/analysis operation with no side effects.
From the tool's definition Tool explicitly states 'Read-only' in description. Action is 'compare accessed property names against Route.responseKeys' and 'Returns MATCH / MISMATCH / PARTIAL per consumer' — purely analytical queries with no modification or side effects.
Attacks that exploit this kind of access
For each Route matching the filter, walk ACCESSES edges from the consumer files that FETCH this route and compare accessed property names against Route.responseKeys. Returns MATCH / MISMATCH / PARTIAL per consumer. Read-only. It is categorised as a Read tool in the OpenCodeHub MCP Server MCP Server, which means it retrieves data without modifying state.
Register the OpenCodeHub MCP Server MCP server in PolicyLayer and add a rule for shape_check: 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 OpenCodeHub MCP Server. Nothing to install.
shape_check 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 shape_check 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 shape_check. 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.
shape_check is provided by the OpenCodeHub MCP Server MCP server (theagenticguy/opencodehub). 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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