AI agents call glob to retrieve information from Mcp Pypi without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The glob function queries the filesystem to enumerate paths matching a pattern. This is a read-only operation analogous to 'list' or 'search'. There is no data modification, code execution, deletion, or financial impact. Severity is low because glob results are deterministic and harmless; the only risk is information disclosure of filesystem structure, which is minimal in most contexts.
From the tool's definition Tool description explicitly states 'return a list of files that match the given pattern' — a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
This function will return a list of files that match the given pattern. It is categorised as a Read tool in the Mcp Pypi MCP Server, which means it retrieves data without modifying state.
Register the Mcp Pypi MCP server in PolicyLayer and add a rule for glob: 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 Pypi. Nothing to install.
glob 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 glob 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 glob. 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.
glob is provided by the Mcp Pypi MCP server (ujjwalko/mcp-pypi-terminal). 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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