update_exercise

Update a custom exercise. Only custom exercises can be edited.

SERVERBusinys SOURCE@businys/mcp-server

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/app-businys-mcp-server/update-exercise.md

WHAT IT DOES

What update_exercise does on Businys

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

RISK

Why update_exercise is rated Medium

This tool modifies existing data (custom exercises) in a reversible manner, which defines the Write category. The severity is medium because unauthorized modifications could corrupt fitness program data or templates used by the independent professional, impacting their service delivery and client records, but the blast radius is limited to exercise records rather than critical business data like contracts or…

From the tool's definition Tool updates a custom exercise (reversible modification). The description explicitly states 'Update a custom exercise,' confirming data modification rather than deletion, execution, or destructive action.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs update_exercise safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Businys, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For update_exercise, this is the rule to start with:

update_exercise Rate-limited

update_exercise 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": {
    "update_exercise": {
      "limits": [
        {
          "counter": "update_exercise_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Businys, apply this rule, and every update_exercise call is checked against it from then on.

FAQ

Questions about update_exercise

What does the update_exercise tool do? +

Update a custom exercise. Only custom exercises can be edited. It is categorised as a Write tool in the Businys MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on update_exercise? +

Register the Businys MCP server in PolicyLayer and add a rule for update_exercise: 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 Businys. Nothing to install.

What risk level is update_exercise? +

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

Can I rate-limit update_exercise? +

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

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

update_exercise is provided by the Businys MCP server (@businys/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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