AI agents use create_rmd to create or update resources in Ast Editor — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Ast Editor environment.
This tool creates a new R Markdown file, which is a reversible write operation. It modifies the filesystem by adding a new file but does not execute code, delete data irreversibly, or move money. The 'create' action is characteristic of Write category. Severity is medium because uncontrolled file creation could clutter the filesystem or overwrite existing files, but the impact is bounded and reversible.
From the tool's definition Tool name 'create_rmd' suggests creating a file with .rmd (R Markdown) extension. The server description emphasizes 'edit files surgically via Abstract Syntax Trees' and sibling tools include 'add_*' operations that create/modify code structures.
Documented attack patterns abuse exactly the kind of access create_rmd gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Ast Editor, and nothing reaches the server without passing your rules. This is the rule we recommend for create_rmd:
{
"version": "1",
"default": "deny",
"tools": {
"create_rmd": {
"limits": [
{
"counter": "create_rmd_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_rmd 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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create_rmd. It is categorised as a Write tool in the Ast Editor MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Ast Editor MCP server in PolicyLayer and add a rule for create_rmd: 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 Ast Editor. Nothing to install.
create_rmd 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 create_rmd 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 create_rmd. 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.
create_rmd is provided by the Ast Editor MCP server (kambleakash0/agent-skills). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Ast Editor, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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59 Ast Editor tools catalogued and risk-classified — across an index of 43,000+ MCP servers.