capacities_save_weblink · Capacities MCP Worker MCP

WHAT IT DOES

What capacities_save_weblink does on Capacities MCP Worker

AI agents use capacities_save_weblink to create or update resources in Capacities MCP Worker — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Capacities MCP Worker environment.

WHY IT NEEDS A POLICY

Why capacities_save_weblink needs a policy

This tool creates new weblink objects in the Capacities knowledge base, which is a reversible write operation. It does not execute arbitrary code, delete data, or move funds. The severity is medium rather than low because a compromised AI agent could spam the knowledge base with malicious URLs or pollute the user's data with unwanted weblinks, but the effect is reversible through deletion.

From the tool's definition Tool description states 'Save a URL as a weblink object in Capacities' with support for 'tags, custom title, description, and markdown notes'. The verb 'save' and action of creating a new weblink object indicates data creation/modification.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

capacities_save_weblink Rate-limited

capacities_save_weblink 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "capacities_save_weblink": {
      "limits": [
        {
          "counter": "capacities_save_weblink_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Capacities MCP Worker, so you can run agents against it safely.

FAQ

Questions about capacities_save_weblink

What does the capacities_save_weblink tool do? +

Save a URL as a weblink object in Capacities. Supports tags, custom title, description, and markdown notes. It is categorised as a Write tool in the Capacities MCP Worker MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on capacities_save_weblink? +

Register the Capacities MCP Worker MCP server in PolicyLayer and add a rule for capacities_save_weblink: 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 Capacities MCP Worker. Nothing to install.

What risk level is capacities_save_weblink? +

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

Can I rate-limit capacities_save_weblink? +

Yes. Add a rate_limit block to the capacities_save_weblink 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 capacities_save_weblink completely? +

Set action: deny in the PolicyLayer policy for capacities_save_weblink. 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 capacities_save_weblink? +

capacities_save_weblink is provided by the Capacities MCP Worker MCP server (tieubao/capacities-mcp-worker). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.