This record as markdown: /tools/app-businys-mcp-server/update-workout.md
What update_workout does on Businys
AI agents use update_workout 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.
Why update_workout is rated Medium
This tool modifies workout records, which is a reversible change. It does not delete data (would be Destructive), execute arbitrary code (would be Execute), or move money (would be Financial). The medium severity reflects that corrupting or modifying a user's fitness data could impact their training program, but the blast radius is limited to one user's workout records and changes can typically be undone.
From the tool's definition Tool name 'update_workout' and description 'Update a workout' indicate modification of existing workout data. The 'update' verb is characteristic of Write operations that reversibly modify data.
Attacks that exploit this kind of access
The rule that runs update_workout 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_workout, this is the rule to start with:
update_workout 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.
The button opens the PolicyLayer dashboard: create your workspace, connect Businys, apply this rule, and every update_workout call is checked against it from then on.
Questions about update_workout
Update a workout. 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.
Register the Businys MCP server in PolicyLayer and add a rule for update_workout: 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.
update_workout is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the update_workout 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.
Set action: deny in the PolicyLayer policy for update_workout. 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.
update_workout 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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