Validate and select a Discourse site for subsequent tool calls. Verifies the site is reachable and retrieves its title. Must be called before using other tools when multiple sites are configured.
Part of the Discource Mcp Tools server.
Free to start. No card required.
AI agents use discourse_select_site to create or modify resources in Discource Mcp Tools. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call discourse_select_site repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Discource Mcp Tools.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"discourse_select_site": {
"limits": [
{
"counter": "discourse_select_site_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Discource Mcp Tools policy for all 15 tools.
These attack patterns abuse exactly the kind of access discourse_select_site gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Validate and select a Discourse site for subsequent tool calls. Verifies the site is reachable and retrieves its title. Must be called before using other tools when multiple sites are configured.. It is categorised as a Write tool in the Discource Mcp Tools MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Discource Mcp Tools MCP server in PolicyLayer and add a rule for discourse_select_site: 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 Discource Mcp Tools. Nothing to install.
discourse_select_site 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 discourse_select_site 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 discourse_select_site. 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.
discourse_select_site is provided by the Discource Mcp Tools MCP server (king-of-the-grackles/discourse-forum-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 15 Discource Mcp Tools tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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