Cancel a queued job. Only jobs that haven
AI agents call cancel_job to permanently remove resources in Mnemosyne MCP — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Cancelling a queued job is an irreversible action - once cancelled, the job's execution is terminated and cannot be undone. The truncated description suggests there are conditions on which jobs can be cancelled, but the core action of cancellation is non-reversible. Severity is medium as the blast radius depends on the importance of the cancelled job, but misuse could disrupt important processing pipelines.
From the tool's definition cancel_job - 'Cancel a queued job. Only jobs that haven' (description truncated)
Attacks that exploit this kind of access
Cancel a queued job. Only jobs that haven. It is categorised as a Destructive tool in the Mnemosyne MCP MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Mnemosyne MCP server in PolicyLayer and add a rule for cancel_job: 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 Mnemosyne MCP. Nothing to install.
cancel_job is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the cancel_job 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 cancel_job. 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.
cancel_job is provided by the Mnemosyne MCP server (sophia-labs/mnemosyne-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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