addPlanActivity

SERVERStable Baseline SOURCEhttps://api.stablebaseline.io/functions/v1/cloud-serve/mcp

Medium RISK CLASS

Category Write

Parameters 81 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-stablebaseline-sb/addplanactivity.md

WHAT IT DOES

What addPlanActivity does on Stable Baseline

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

Parameter	Type	Required	Description
`planId`	string	Yes
`comment`	string	—	Comment text.
`metadata`	object	—	Additional context.
`newValue`	string	—	For field_change: new value.
`oldValue`	string	—	For field_change: previous value.
`fieldName`	string	—	For field_change: field name.
`projectId`	string	—	Optional. Narrows a friendly-id lookup to one project. Only needed when a friendly id is ambiguous — TAS-/IMP-/PLN- ids are numbered per PROJECT, so the same id
`activityType`	string	—	Type: comment, agent_update, field_change. Default: comment. The Activity tab shows a comment or an agent_update as plain text (line breaks kept, no formatting)

Parameters from the server's own tool schema.

RISK

Why addPlanActivity is rated Medium

An AI agent can call addPlanActivity faster than any human can review: one bad instruction and it creates or modifies resources in Stable Baseline by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs addPlanActivity safely

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

addPlanActivity Rate-limited

addPlanActivity 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": {
    "addPlanActivity": {
      "limits": [
        {
          "counter": "addplanactivity_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 Stable Baseline, apply this rule, and every addPlanActivity call is checked against it from then on.

FAQ

Questions about addPlanActivity

What does the addPlanActivity tool do? +

Add a comment or activity entry to a plan. People read a plan's entries on its Activity tab in the app, newest first, and the answer links straight to it. An entry added through an API key or a connected app shows that key's or app's name, marked as an agent. getPlan returns the newest 50 entries. It is categorised as a Write tool in the Stable Baseline MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does addPlanActivity accept? +

addPlanActivity accepts 8 parameters: planId, comment, metadata, newValue, oldValue, fieldName, projectId, activityType. Required: planId. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on addPlanActivity? +

Register the Stable Baseline MCP server in PolicyLayer and add a rule for addPlanActivity: 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 Stable Baseline. Nothing to install.

What risk level is addPlanActivity? +

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

Can I rate-limit addPlanActivity? +

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

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

addPlanActivity is provided by the Stable Baseline MCP server (https://api.stablebaseline.io/functions/v1/cloud-serve/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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