AI agents call ism_list_maturities to retrieve information from Ism without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool appears to be a simple query/retrieval function that lists maturity levels from the ISM control framework. There are no side effects, data modifications, destructive actions, financial implications, or code execution suggested by the name or server context.
From the tool's definition Tool name 'ism_list_maturities' uses the verb 'list', which is a Read operation. The description is empty, but the sibling tools on this server (ism_list_by_classification, ism_list_by_topic, ism_get) are all Read operations that query the ISM manual without…
Attacks that exploit this kind of access
ism_list_maturities. It is categorised as a Read tool in the Ism MCP Server, which means it retrieves data without modifying state.
Register the Ism MCP server in PolicyLayer and add a rule for ism_list_maturities: 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 Ism. Nothing to install.
ism_list_maturities 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 ism_list_maturities 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 ism_list_maturities. 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.
ism_list_maturities is provided by the Ism MCP server (samueldudley/ism-mcp). 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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