delete-mail-attachment

Delete a mail attachment.

SERVERMs 365 SOURCE@jo3zik/ms-365-mcp-server

Critical RISK CLASS

Category Destructive

Parameters 62 required

Recommended Hiddensee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/jo3zik-ms-365-mcp-server/delete-mail-attachment.md

WHAT IT DOES

What delete-mail-attachment does on Ms 365

AI agents call delete-mail-attachment to permanently remove resources in Ms 365, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

Parameter	Type	Required	Description
`confirm`	boolean	—	For destructive operations when the confirm gate is enabled (MS365_MCP_REQUIRE_CONFIRM=true; off by default). Set to true only after the user has explicitly app
`If-Match`	string	—	ETag
`messageId`	string	Yes	Value for the 'messageId' path segment. Pass it under the name 'messageId', not as 'id'. Use the 'id' field of the message object as returned by Microsoft Graph
`attachmentId`	string	Yes	Value for the 'attachmentId' path segment. Pass it under the name 'attachmentId', not as 'id'. Use the 'id' field of the attachment object as returned by Micros
`includeHeaders`	boolean	—	Include response headers (including ETag) in the response metadata
`excludeResponse`	boolean	—	Exclude the full response body and only return success or failure indication

Parameters from the server's own tool schema.

RISK

Why delete-mail-attachment is rated Critical

An AI agent that decides to call delete-mail-attachment doesn't hesitate, doesn't double-check, and doesn't stop at one. Whatever it removes from Ms 365 is gone. There is no undo for destructive operations.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs delete-mail-attachment safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Ms 365, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For delete-mail-attachment, this is the rule to start with:

delete-mail-attachment Hidden

delete-mail-attachment is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "delete-mail-attachment"
  ]
}

RESTRICT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Ms 365, apply this rule, and every delete-mail-attachment call is checked against it from then on.

FAQ

Questions about delete-mail-attachment

What does the delete-mail-attachment tool do? +

Delete a mail attachment. It is categorised as a Destructive tool in the Ms 365 MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

What parameters does delete-mail-attachment accept? +

delete-mail-attachment accepts 6 parameters: confirm, If-Match, messageId, attachmentId, includeHeaders, excludeResponse. Required: messageId, attachmentId. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on delete-mail-attachment? +

Register the Ms 365 MCP server in PolicyLayer and add a rule for delete-mail-attachment: 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 Ms 365. Nothing to install.

What risk level is delete-mail-attachment? +

delete-mail-attachment is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit delete-mail-attachment? +

Yes. Add a rate_limit block to the delete-mail-attachment 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.

How do I block delete-mail-attachment completely? +

Set action: deny in the PolicyLayer policy for delete-mail-attachment. 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.

What MCP server provides delete-mail-attachment? +

delete-mail-attachment is provided by the Ms 365 MCP server (@jo3zik/ms-365-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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