create-post

// WHEN AI AGENTS USE THIS TOOL

AI agents use create-post to create or modify resources in Bluesky MCP Server. 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.

// WHY ENFORCE A POLICY ON CREATE-POST

Without a policy, an AI agent could call create-post repeatedly, creating or modifying resources faster than any human could review. Intercept's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Bluesky MCP Server.

// RECOMMENDED POLICY

Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.

brianellin-bsky-mcp-server.yaml

tools:
  create-post:
    rules:
      - action: allow
        rate_limit:
          max: 30
          window: 60

See the full Bluesky MCP Server policy for all 21 tools.

// DETAILS

Tool Name create-post

Category Write

MCP Server Bluesky MCP Server MCP Server

Risk Level Medium

// MORE BLUESKY MCP SERVER TOOLS

Write convert-url-to-uri Write like-post Read follow-user Read get-feed-posts Read get-followers Read get-follows Read get-liked-posts Read get-list-posts

View all 21 tools →

// WHAT CAN GO WRONG

Agents calling write-class tools like create-post have been implicated in these attack patterns. Read the full case and prevention policy for each:

Browse the full MCP Attack Database →

// OTHER WRITE TOOLS ACROSS MCP SERVERS

Other tools in the Write risk category across the catalogue. The same policy patterns (rate-limit, validate) apply to each.

AbraFlexi contact_create AbraFlexi contact_update AbraFlexi evidence_create AbraFlexi evidence_update AbraFlexi invoice_issued_update AbraFlexi invoice_received_create

// RELATED READING

// FAQ

What does the create-post tool do? +

Create a new post on Bluesky. It is categorised as a Write tool in the Bluesky MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create-post? +

Add a rule in your Intercept YAML policy under the tools section for create-post. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Bluesky MCP Server MCP server.

What risk level is create-post? +

create-post is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create-post? +

Yes. Add a rate_limit block to the create-post rule in your Intercept 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 create-post completely? +

Set action: deny in the Intercept policy for create-post. 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 create-post? +

create-post is provided by the Bluesky MCP Server MCP server (brianellin/bsky-mcp-server). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policies on Bluesky MCP Server