extend_vesting · Basis MCP Server MCP: Risk & Policy

WHAT IT DOES

What extend_vesting does on Basis MCP Server

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

WHY IT NEEDS A POLICY

Why extend_vesting needs a policy

Extending a vesting duration modifies an existing vesting schedule's parameters (reversibly in the sense that vesting can be further modified, though the extension itself may lock tokens longer). This is a Write operation as it updates/modifies existing data rather than deleting or executing arbitrary code.

From the tool's definition Extend vesting duration

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

extend_vesting Rate-limited

extend_vesting 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": {
    "extend_vesting": {
      "limits": [
        {
          "counter": "extend_vesting_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

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

FAQ

Questions about extend_vesting

What does the extend_vesting tool do? +

Extend vesting duration. It is categorised as a Write tool in the Basis 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 extend_vesting? +

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

What risk level is extend_vesting? +

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

Can I rate-limit extend_vesting? +

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

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

extend_vesting is provided by the Basis MCP Server MCP server (launch-on-basis/mcp-ts). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.