// MCP TOOL REFERENCE

JMAP MCP TOOLS

11 tools from the JMAP MCP MCP Server, categorised by risk level.

// ALL 11 JMAP MCP TOOLS

READ 6 tools

Read get_email_changes Get IDs of emails created, updated, or destroyed since a previous state. Use the state string from a get_em... Read get_emails Get specific emails by their IDs. Use the Read get_mailboxes Get list of mailboxes/folders with their IDs, names, and metadata. Call this first to get mailbox IDs neede... Read get_search_updates Get changes within a previous search query since its last queryState. You MUST pass the same filter paramet... Read get_threads Get email threads by their IDs. Thread IDs are available from get_emails responses (threadId property). Ret... Read search_emails Search emails with filters (text, sender/recipient, dates, keywords). All filters are AND

WRITE 4 tools

Write reply_to_email Reply to an existing email. Automatically sets correct To/CC, subject (Re: prefix), and threading headers (... Write mark_emails Mark emails as read/unread or flagged/unflagged. You can update multiple keywords at once. Write move_emails Move emails to a different mailbox. Requires a mailbox ID — use get_mailboxes first to find the target mail... Write send_email Send a new email. Requires either textBody or htmlBody (or both). The identityId parameter is optional — if...

DESTRUCTIVE 1 tools

Destructive delete_emails Delete emails permanently. This action cannot be undone. Prefer move_emails to Trash mailbox for safer dele...

// FAQ

How many tools does the JMAP MCP MCP server have? +

The JMAP MCP MCP server exposes 11 tools across 3 categories: Read, Write, Destructive.

How do I enforce policies on JMAP MCP tools? +

Route the JMAP MCP server through the PolicyLayer gateway. Define allow, deny, or approval rules per tool in the dashboard; they are enforced on every call before it reaches the server.

What risk categories do JMAP MCP tools fall into? +

JMAP MCP tools are categorised as Read (6), Write (4), Destructive (1). Each category has a recommended default policy.

Enforce policy on every JMAP MCP tool call.

Deterministic rules across all 11 JMAP MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

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