AI agents call schema_status to retrieve information from Zion without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves status information about schema daemon sessions and their TTL (time-to-live) state. There are no side effects, no data modification, no command execution, and no destructive operations.
From the tool's definition The tool is called 'schema_status' and the description states it 'Show[s] daemon schema sessions and TTL state.' These verbs ('show') indicate retrieval and querying of status information without modifying or executing external operations.
Attacks that exploit this kind of access
Show daemon schema sessions and TTL state. It is categorised as a Read tool in the Zion MCP Server, which means it retrieves data without modifying state.
Register the Zion MCP server in PolicyLayer and add a rule for schema_status: 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 Zion. Nothing to install.
schema_status 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 schema_status 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 schema_status. 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.
schema_status is provided by the Zion MCP server (zion-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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