reply_to_message
Reply to a message. Threading headers are set automatically.
This record as markdown: /tools/deadsimple-email/reply-to-message.md
What reply_to_message does on Pypi:deadsimple Email
AI agents use reply_to_message to create or update resources in Pypi:deadsimple Email, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Pypi:deadsimple Email environment.
Why reply_to_message is rated Medium
This tool creates new email content (a reply) and sends it, which is a Write operation—it generates data without deleting or executing arbitrary code. Severity is medium because sending unsolicited or misleading emails could damage reputation, enable phishing-like attacks, or spam recipients, but the action is reversible (the message could theoretically be recalled or the recipient notified).
From the tool's definition Tool name 'reply_to_message' and description 'Reply to a message' indicate the tool creates or modifies email communication by composing and sending a response, which is a reversible write operation.
Attacks that exploit this kind of access
The rule that runs reply_to_message safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Pypi:deadsimple Email, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For reply_to_message, this is the rule to start with:
reply_to_message 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 Pypi:deadsimple Email, apply this rule, and every reply_to_message call is checked against it from then on.
Questions about reply_to_message
Reply to a message. Threading headers are set automatically. It is categorised as a Write tool in the Pypi:deadsimple Email MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Pypi:deadsimple Email MCP server in PolicyLayer and add a rule for reply_to_message: 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 Pypi:deadsimple Email. Nothing to install.
reply_to_message 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 reply_to_message 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 reply_to_message. 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.
reply_to_message is provided by the Pypi:deadsimple Email MCP server (pypi:deadsimple-email). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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