AI agents use farnsworth_project_achieve_milestone to create or update resources in Farnsworth — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Farnsworth environment.
This tool modifies the state of a milestone by marking it as achieved. This is a reversible data modification (a status update), making it a Write operation. Misuse has low blast radius as it only affects project tracking data.
From the tool's definition Mark a milestone as achieved
Documented attack patterns abuse exactly the kind of access farnsworth_project_achieve_milestone gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Farnsworth, and nothing reaches the server without passing your rules. This is the rule we recommend for farnsworth_project_achieve_milestone:
{
"version": "1",
"default": "deny",
"tools": {
"farnsworth_project_achieve_milestone": {
"limits": [
{
"counter": "farnsworth_project_achieve_milestone_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}farnsworth_project_achieve_milestone 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.
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Mark a milestone as achieved. It is categorised as a Write tool in the Farnsworth MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Farnsworth MCP server in PolicyLayer and add a rule for farnsworth_project_achieve_milestone: 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 Farnsworth. Nothing to install.
farnsworth_project_achieve_milestone 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 farnsworth_project_achieve_milestone 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 farnsworth_project_achieve_milestone. 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.
farnsworth_project_achieve_milestone is provided by the Farnsworth MCP server (timowhite88/farnsworth). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 20 Farnsworth tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
20 Farnsworth tools catalogued and risk-classified — across an index of 42,500+ MCP servers.