Query the substrate
AI agents call myco_query_raw_material to retrieve information from Myco — Agent-First Cognitive Substrate without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a query operation on the cognitive substrate, which is a read-only data retrieval action. There is no indication of side effects, modifications, deletion, code execution, or financial impact. The low severity reflects that querying a graph structure poses minimal risk if misused—an agent could retrieve large amounts of data but cannot cause irreversible damage through this operation alone.
From the tool's definition Tool name 'query_raw_material' and description 'Query the substrate' indicate data retrieval operations. The verb 'query' is a characteristic Read operation that retrieves or inspects data without modifying it.
Attacks that exploit this kind of access
Query the substrate. It is categorised as a Read tool in the Myco — Agent-First Cognitive Substrate MCP Server, which means it retrieves data without modifying state.
Register the Myco — Agent-First Cognitive Substrate MCP server in PolicyLayer and add a rule for myco_query_raw_material: 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 Myco — Agent-First Cognitive Substrate. Nothing to install.
myco_query_raw_material 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 myco_query_raw_material 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 myco_query_raw_material. 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.
myco_query_raw_material is provided by the Myco — Agent-First Cognitive Substrate MCP server (myco). 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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