List all modules in a project with their types, paths, and context status.
AI agents call list_modules to retrieve information from Open Context without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and enumerates project metadata (modules, their types, paths, and context status). It performs no writes, deletions, code execution, or external operations. The blast radius of misuse is minimal—an agent could over-retrieve metadata but cannot alter state or cause harm.
From the tool's definition Tool description states 'List all modules in a project' — a retrieval operation with no modification or side effects. Name 'list_modules' and verb 'List' confirm read-only semantics.
Attacks that exploit this kind of access
List all modules in a project with their types, paths, and context status. It is categorised as a Read tool in the Open Context MCP Server, which means it retrieves data without modifying state.
Register the Open Context MCP server in PolicyLayer and add a rule for list_modules: 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 Open Context. Nothing to install.
list_modules 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_modules 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_modules. 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_modules is provided by the Open Context MCP server (niawjunior/opencontext). 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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