plugins

name	plugins
description	Install Superset plugins, connect the accounts they need, and call their MCP tools through the credential proxy. Use when the user wants a plugin installed, removed, enabled, or connected, asks what tools a plugin exposes, wants to call one, adds a marketplace, or asks why a plugin's tools are not available.
argument-hint	what you want to install, connect, or call
allowed-tools	Bash(superset plugins:*) Bash(superset mcp:*) Bash(superset marketplace:*) Bash(superset skills:*)

Plugins and their tools

A plugin brings two things: skills, which land in the directories agents read, and MCP tools, which are called through Superset's proxy. Install state lives on the account, so a plugin installed here is installed everywhere you sign in. The credential does not. It stays server-side, and no token is ever written to this machine.

1. See what is there

superset plugins list                  # installed, with status per plugin
superset plugins list --available      # everything the marketplace offers
superset skills list                   # skills on this machine, and their paths

The status column is the thing to read. needs connection means the skills are installed but no account is authorized, so the tools will fail. That is a connect step, not a bug.

2. Install

superset plugins install linear
superset plugins install linear --update      # move to the marketplace's current version
superset plugins install linear@superset      # when two marketplaces carry the same name

Install records the plugin on the account and materializes its skills locally. It prints whether a connection is still needed.

3. Connect an account

Two shapes, and the plugin's manifest decides which:

superset plugins connect linear                       # oauth2: prints a URL to open
superset plugins connect sentry --inputs '{"api_key":"..."}'
echo '{"api_key":"..."}' | superset plugins connect sentry --inputs -

Prefer stdin for a real credential: an argument is visible in ps and in shell history. OAuth cannot finish headlessly: hand the URL to the user, then confirm with superset plugins connections --plugin linear.

If a plugin offers more than one method, the command says so and lists them. Ask the user which they want rather than picking.

4. Call its tools

Address a plugin by the plugin id from superset plugins list. That is a connection id, so a plugin with two connected accounts has two, one per account. Pick the account deliberately; there is no default.

superset mcp tools --plugin-id <id>
superset mcp call-tool list_issues --plugin-id <id>
superset mcp call-tool create_issue --plugin-id <id> '{"team":"ENG","title":"Export 500s"}'
echo '{"team":"ENG","title":"..."}' | superset mcp call-tool create_issue --plugin-id <id>

List the tools before calling one. Names and argument schemas come from the plugin's server, not from anything in this repo, and they change between versions.

The call goes out from Superset's API, which attaches the credential. That is why this works with no token on the machine, and why a network-restricted sandbox can still reach a plugin's tools.

Reading a failure

What you see	What it means
needs connection in plugins list	Installed, not authorized. Run plugins connect.
401/403 from a tool call	The stored credential was revoked or expired. Reconnect.
is not installed	Installed on the account but not resolvable here; run plugins install --update.
More than one marketplace named	Two installs share the name. Re-run with name@marketplace.

5. Turn things off

superset plugins remove linear        # uninstall, and reap the skills it provisioned
superset marketplace list
superset marketplace install owner/repo          # add a third-party marketplace
superset marketplace remove <name>

remove reaps only what the plugin provisioned; hand-written skills in the same directory are left alone.

Anti-patterns

• Calling a tool without listing tools first. You are guessing at a name and a schema that the plugin owns.
• Passing a secret as a command argument when the command accepts stdin.
• Treating superset plugins sync as a fix for a missing connection. Sync converges skills on this machine; it has nothing to do with credentials.
• Installing a plugin to "see what it does". Install writes to the user's account and every machine they use. Ask first.