AI agents use add_comment_to_document to create or update resources in Basecamp MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Basecamp MCP Server environment.
This tool creates new content (comments) within Basecamp documents, which is a reversible write operation. While comments can typically be deleted or edited later, the primary action is to persistently add new data to a document. The severity is medium because misuse could flood documents with spam or inappropriate content, but the impact is limited to a single document and reversible.
From the tool's definition The tool 'add_comment_to_document' performs an action that creates new data (a comment) and modifies the state of an existing document by adding content to it. The description explicitly states it adds a comment, which is a create/modify operation.
Documented attack patterns abuse exactly the kind of access add_comment_to_document gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Basecamp MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for add_comment_to_document:
{
"version": "1",
"default": "deny",
"tools": {
"add_comment_to_document": {
"limits": [
{
"counter": "add_comment_to_document_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}add_comment_to_document 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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Add a comment to a document. It is categorised as a Write tool in the Basecamp MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Basecamp MCP Server MCP server in PolicyLayer and add a rule for add_comment_to_document: 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 Basecamp MCP Server. Nothing to install.
add_comment_to_document 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 add_comment_to_document 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 add_comment_to_document. 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.
add_comment_to_document is provided by the Basecamp MCP Server MCP server (qusaiisaleem/basecamp-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Basecamp MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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56 Basecamp MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.