Low Risk

circle_list_posts

List posts in the Circle community. Returns paginated results with full post details including title, content (HTML and TipTap), author info, and engagement metrics (likes_count, comments_count). Filter by space_id, space_group_id, status (draft/published/scheduled), or search_text. Use page/per_...

Part of the Circle MCP Server server.

circle_list_posts is read-only, but an agent in a loop can still rack up calls and cost. PolicyLayer caps every call before it runs. Live in minutes.

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AI agents call circle_list_posts to retrieve information from Circle MCP Server without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.

Even though circle_list_posts only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.

Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "circle_list_posts": {}
  }
}

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These attack patterns abuse exactly the kind of access circle_list_posts gives an agent. Each links to the full case and the policy that stops it:

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Every attack above starts with a tool call. PolicyLayer checks each one against your policy first, so circle_list_posts only ever does what you allow.

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Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.

What does the circle_list_posts tool do? +

List posts in the Circle community. Returns paginated results with full post details including title, content (HTML and TipTap), author info, and engagement metrics (likes_count, comments_count). Filter by space_id, space_group_id, status (draft/published/scheduled), or search_text. Use page/per_page for pagination and sort for ordering. For unanswered-post detection, use circle_detect_unanswered_posts instead.. It is categorised as a Read tool in the Circle MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on circle_list_posts? +

Register the Circle MCP Server MCP server in PolicyLayer and add a rule for circle_list_posts: 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 Circle MCP Server. Nothing to install.

What risk level is circle_list_posts? +

circle_list_posts is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit circle_list_posts? +

Yes. Add a rate_limit block to the circle_list_posts 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.

How do I block circle_list_posts completely? +

Set action: deny in the PolicyLayer policy for circle_list_posts. 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.

What MCP server provides circle_list_posts? +

circle_list_posts is provided by the Circle MCP Server MCP server (iamnortey/circle-so-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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