Progressive-disclosure usage manual for the WeChat MCP tool. Read this when you
need detail beyond the one-line action descriptions: user_id targeting, send vs
reply, check/read/search, media_path attachments (image/video/voice/file),
contacts/accounts basics, and external-delivery side-effect caveats. Pulled on
demand via action='manual'; you do not need to call it before every send.
Instalación
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Progressive-disclosure usage manual for the WeChat MCP tool. Read this when you
need detail beyond the one-line action descriptions: user_id targeting, send vs
reply, check/read/search, media_path attachments (image/video/voice/file),
contacts/accounts basics, and external-delivery side-effect caveats. Pulled on
demand via action='manual'; you do not need to call it before every send.
Messages target a WeChat user by user_id (e.g. wxid_abc123@im.wechat).
user_id is the routing truth; aliases are convenience labels only. Use the
user_id returned by check/read/contacts and do not invent one — when
in doubt, especially for replies, take it from read/check.
SEND vs REPLY
reply (message_id from read results, text) threads your response to a
specific incoming message; prefer it when answering a particular message.
send (user_id, text) starts a fresh message; use it for unsolicited or
standalone messages.
MEDIA / ATTACHMENTS
send with media_path (absolute path) attaches a file. Type is detected from
the extension: .jpg/.png → image, .mp4 → video, .wav/.mp3 → voice,
anything else → file.
For charts, reports, and other artifacts the user should open intact, send them
as a file/document rather than pasting a local path into the message text.
INBOUND MEDIA / FILES
Inbound media is rendered into message text as tags such as [Image: path],
[Voice: "transcript" (audio: path)], [File: name (path)], and
[Video: path]. Use those paths as local artifacts, not as messages to paste
back to the user.
WeChat document downloads may be encrypted/cache placeholders rather than the
real PDF/ZIP/etc. Before parsing a received file, validate its magic bytes
(for example %PDF- for PDFs, PK for ZIP/DOCX). If the bytes do not match
the claimed file type, ask the user to re-export with WeChat "Save As" or send
a cloud/download link. This is an agent-side validation practice, not a
guarantee from the MCP transport.
Images and transcribed voice messages are usually more directly usable, but
still verify file existence/readability before analysis.
READING: check / read / search
check: list recent conversations with unread counts; treat previews as
hints, not complete context.
read: read messages from one user (user_id; optional limit). The read
view merges inbox and sent messages, which helps confirm whether you already
replied.
search: regex search over inbox messages (query; optional user_id). It is
for locating inbound content, not proving that no sent reply exists.
WAKE / REPLAY / DUPLICATE-REPLY DISCIPLINE
Reply once per inbound message_id. Before sending after a refresh, molt, or
worker-hang recovery, use read to reconcile the merged inbox+sent view and
avoid duplicate replies.
If a wake notification is based on a preview and an immediate read/check
seems blocked by idle/sleep recovery, acknowledge from the preview if safe,
then retry the producer read once the agent is active. Avoid tight polling
loops.
Some runtimes deduplicate upstream inbound replay by provider message_id and
cursor checkpoints; if investigating inflated unread counts, confirm the
runtime version/state before assuming the MCP lost messages.
CONTACTS / ACCOUNTS
contacts: list saved contacts.
add_contact: save a contact alias (user_id, alias).
remove_contact: remove a contact (alias or user_id).
accounts: list configured WeChat accounts.
SIDE EFFECTS & ERROR SURFACING
send and reply deliver to real users — external side effects. Confirm
recipient and content before sending unsolicited messages.
Actions return a result dict on success or {'error': <message>} on failure
(e.g. missing user_id, unreadable media_path). Check for the 'error' key
and surface or act on it rather than assuming delivery.
