Disapprove a completed task in Bitrix24 (reject the work, send back for revision)
AI agents use bitrix_task_disapprove to create or update resources in Email MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Email MCP Server environment.
This tool modifies task metadata and status in Bitrix24 by transitioning a task from completed/approved to a rejected state requiring revision. The action is reversible (a task can be re-approved or the state changed again), making it Write rather than Destructive.
From the tool's definition Tool description states it 'Disapprove a completed task' and 'reject the work, send back for revision' — this modifies task state reversibly by changing its approval status and triggering a workflow action (sending back for revision).
Attacks that exploit this kind of access
Disapprove a completed task in Bitrix24 (reject the work, send back for revision). It is categorised as a Write tool in the Email MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Email MCP Server MCP server in PolicyLayer and add a rule for bitrix_task_disapprove: 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 Email MCP Server. Nothing to install.
bitrix_task_disapprove 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 bitrix_task_disapprove 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 bitrix_task_disapprove. 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.
bitrix_task_disapprove is provided by the Email MCP Server MCP server (sventern/mcp_email). 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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