todoist_complete_task
Mark a task as complete by searching for it by name
This record as markdown: /tools/abhiz123-todoist-mcp-server/todoist-complete-task.md
What todoist_complete_task does on Todoist MCP Server
AI agents use todoist_complete_task to create or update resources in Todoist MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Todoist MCP Server environment.
Why todoist_complete_task is rated Medium
This tool modifies existing data (task completion status) but does so reversibly—tasks can be unmarked as complete. This is a Write operation rather than Destructive because the action is not permanent and can be undone. The blast radius is low since marking tasks complete affects only task state and workflow tracking, not financial or irreversible data loss.
From the tool's definition Tool 'marks a task as complete' which is a reversible state change to task data. The operation can be undone by marking the task incomplete again, distinguishing it from the irreversible todoist_delete_task.
Attacks that exploit this kind of access
The rule that runs todoist_complete_task safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Todoist MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For todoist_complete_task, this is the rule to start with:
todoist_complete_task stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Todoist MCP Server, apply this rule, and every todoist_complete_task call is checked against it from then on.
Questions about todoist_complete_task
Mark a task as complete by searching for it by name. It is categorised as a Write tool in the Todoist MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Todoist MCP Server MCP server in PolicyLayer and add a rule for todoist_complete_task: 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 Todoist MCP Server. Nothing to install.
todoist_complete_task is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the todoist_complete_task 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 todoist_complete_task. 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.
todoist_complete_task is provided by the Todoist MCP Server MCP server (abhiz123/todoist-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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