AI agents call list_tasks to retrieve information from Gcal without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool queries and returns existing task data, applying optional filters for presentation. It does not create, modify, delete, or execute any operations - purely a read operation that retrieves information from Google Tasks and local metadata. Low severity as misuse would only expose calendaring/task data the user already has access to.
From the tool's definition Tool name 'list_tasks' and description 'List tasks with optional filters. Returns a merged view of Google Tasks data + local metadata.' - explicitly performs data retrieval with no modification or side effects.
Attacks that exploit this kind of access
List tasks with optional filters. Returns a merged view of Google Tasks data + local metadata. Sort order: Q1 → Q2 → Q3 → Q4. It is categorised as a Read tool in the Gcal MCP Server, which means it retrieves data without modifying state.
Register the Gcal MCP server in PolicyLayer and add a rule for list_tasks: 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 Gcal. Nothing to install.
list_tasks 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_tasks 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_tasks. 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_tasks is provided by the Gcal MCP server (kwikkid/gcalcli). 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.
Teams ship this data inside their own products. See what a licence covers →