set_discussion_state
Pin or unpin, lock or unlock a forum discussion, as the discussion list's menu does; what's already so is left alone. Returns the discussion as the forum lists it afterwards. Students see it: confirm with the person first.
This record as markdown: /tools/falkenslab-moodle-mcp/set-discussion-state.md
What set_discussion_state does on Moodle
AI agents use set_discussion_state to create or update resources in Moodle, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Moodle environment.
| Parameter | Type | Required | Description |
|---|---|---|---|
locked | boolean | — | |
pinned | boolean | — | |
forumId | integer | Yes | The forum's id (course module id), as get_course_structure gives it |
discussionId | integer | Yes | As list_discussions gives it |
Parameters from the server's own tool schema.
Why set_discussion_state is rated Medium
An AI agent can call set_discussion_state faster than any human can review: one bad instruction and it creates or modifies resources in Moodle by the hundred, each call as confident as the last.
Attacks that exploit this kind of access
The rule that runs set_discussion_state safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Moodle, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For set_discussion_state, this is the rule to start with:
set_discussion_state stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Moodle, apply this rule, and every set_discussion_state call is checked against it from then on.
Questions about set_discussion_state
Pin or unpin, lock or unlock a forum discussion, as the discussion list's menu does; what's already so is left alone. Returns the discussion as the forum lists it afterwards. Students see it: confirm with the person first. It is categorised as a Write tool in the Moodle MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
set_discussion_state accepts 4 parameters: locked, pinned, forumId, discussionId. Required: forumId, discussionId. The full parameter table on this page comes from the server's own tool schema.
Register the Moodle MCP server in PolicyLayer and add a rule for set_discussion_state: 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 Moodle. Nothing to install.
set_discussion_state is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the set_discussion_state 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.
Set action: deny in the PolicyLayer policy for set_discussion_state. 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.
set_discussion_state is provided by the Moodle MCP server (@falkenslab/moodle-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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