✍️ Writing
The six write tools and the confirm gate that stops any of them acting by accident.
The confirm gate
Every write tool takes a confirm boolean that defaults to false. Called without confirm: true, a tool does nothing and returns:
Error: Set confirm: true to perform this write action.This lets a client propose an action, show it to you, and only then repeat the call with confirm: true.
Tools
| Tool | Parameters | Effect |
|---|---|---|
post | text, confirm | Publish a post |
thread_post | posts, confirm | Publish a self-thread |
reply | url, text, confirm | Reply to a post |
like | url, confirm | Like a post |
repost | url, confirm | Repost a post |
follow | handle, confirm | Follow an account |
Posts are limited to 300 characters, as stated in the tool descriptions for post and reply. The server itself does not check the length; an over-long post is rejected downstream and comes back as an Error: message.
post
{ "text": "Shipped a new MCP server.", "confirm": true }thread_post
posts is an ordered array of texts. Each post replies to the previous one.
{ "posts": ["First post of the thread.", "Second post, replying to the first."], "confirm": true }reply
url is the post to reply to, as a URL or an at:// URI.
{ "url": "https://bsky.app/profile/alice.example.com/post/3kexample", "text": "Agreed.", "confirm": true }like and repost
Both take a post URL or at:// URI. On success they return { "liked": "<url>" } or { "reposted": "<url>" }.
{ "url": "at://alice.example.com/app.bsky.feed.post/3kexample", "confirm": true }follow
handle is the account to follow. On success it returns { "followed": "<handle>" }.
{ "handle": "bob.example.com", "confirm": true }