AI agents call list_assignments to retrieve information from Omniplan without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs a query/listing action typical of Read category operations. It retrieves assignment information from an OmniPlan project without modifying, creating, or deleting data. The empty description reduces confidence slightly, but the 'list_' prefix and context of a project management server strongly suggest this is a non-destructive data retrieval tool.
From the tool's definition Tool name 'list_assignments' indicates a retrieval operation with no side effects. The empty description is uninformative, but the naming pattern aligns with read operations ('list_') which retrieve and query data.
Attacks that exploit this kind of access
list_assignments. It is categorised as a Read tool in the Omniplan MCP Server, which means it retrieves data without modifying state.
Register the Omniplan MCP server in PolicyLayer and add a rule for list_assignments: 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 Omniplan. Nothing to install.
list_assignments 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 list_assignments 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 list_assignments. 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.
list_assignments is provided by the Omniplan MCP server (johntrandall/omniplan-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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