AI agents call documentation to retrieve information from Substrate without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves documentation content without side effects. It is a read-only operation that queries or fetches existing documentation artifacts. No data is created, modified, deleted, or executed. The low severity reflects that documentation access poses minimal risk in typical scenarios.
From the tool's definition Tool is described as "Access system architecture and methodology documentation" - a retrieval operation with no modification, deletion, or execution capability.
Attacks that exploit this kind of access
Access system architecture and methodology documentation. It is categorised as a Read tool in the Substrate MCP Server, which means it retrieves data without modifying state.
Register the Substrate MCP server in PolicyLayer and add a rule for documentation: 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 Substrate. Nothing to install.
documentation 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 documentation 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 documentation. 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.
documentation is provided by the Substrate MCP server (ivan-saorin/substrate). 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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