updateDraft
Replaces the contents of an existing Gmail draft. The new contents fully overwrite the old draft (this is a full replace, not a patch), attachments included: pass attachments again or the draft loses them. The draft stays in its thread unless replyToMessageId names another message. Use this when ...
This record as markdown: /tools/a-bonus-google-docs-mcp/updatedraft.md
What updateDraft does on Claude MCP x Google Docs
AI agents use updateDraft to create or update resources in Claude MCP x Google Docs, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Claude MCP x Google Docs environment.
Why updateDraft is rated Medium
Modifies draft emails reversibly; user can undo before sending. Not destructive since drafts persist.
From the tool's definition Replaces the contents of an existing Gmail draft, full overwrite
Attacks that exploit this kind of access
The rule that runs updateDraft safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Claude MCP x Google Docs, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For updateDraft, this is the rule to start with:
updateDraft 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 Claude MCP x Google Docs, apply this rule, and every updateDraft call is checked against it from then on.
Questions about updateDraft
Replaces the contents of an existing Gmail draft. The new contents fully overwrite the old draft (this is a full replace, not a patch), attachments included: pass attachments again or the draft loses them. The draft stays in its thread unless replyToMessageId names another message. Use this when iterating on an AI-composed draft before sending. It is categorised as a Write tool in the Claude MCP x Google Docs MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Claude MCP x Google Docs MCP server in PolicyLayer and add a rule for updateDraft: 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 Claude MCP x Google Docs. Nothing to install.
updateDraft 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 updateDraft 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 updateDraft. 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.
updateDraft is provided by the Claude MCP x Google Docs MCP server (a-bonus/google-docs-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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