Medium Risk

buildcontext

buildcontext

How to control buildcontext ↓

What buildcontext does on Project MCP Server

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

Medium Risk

Why buildcontext needs a policy

Given the server manages project knowledge graphs and sibling tools include 'loadcontext', 'deletecontext', 'startsession', and 'endsession', 'buildcontext' most likely creates or constructs a new context (knowledge graph entry) in the project management system. This is consistent with a Write operation.

From the tool's definition Tool name is 'buildcontext'; description is empty or uninformative.

Documented attack patterns abuse exactly the kind of access buildcontext gives an agent:

How to control buildcontext

PolicyLayer is an MCP gateway — it sits between your AI agents and Project MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for buildcontext:

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "buildcontext": {
      "limits": [
        {
          "counter": "buildcontext_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

buildcontext 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.

  1. Create a free account and register Project MCP Server — nothing to install.
  2. Add this policy — paste it, or build it visually.
  3. Point your MCP client (Claude, Cursor, anything) at your gateway URL.
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Related tools and policies

Go deeper

Questions about buildcontext

What does the buildcontext tool do? +

buildcontext. It is categorised as a Write tool in the Project 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 buildcontext? +

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

What risk level is buildcontext? +

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

Can I rate-limit buildcontext? +

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

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

buildcontext is provided by the Project MCP Server MCP server (tejpalvirk/project). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Project MCP Server tool call.

Start from Project MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

Free to start. No card required.

6 Project MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.

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