AI agents use create_file to create or update resources in Kontexta — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Kontexta environment.
This tool performs a reversible write operation that creates new files. It does not execute arbitrary code, delete existing data, or move money. While it modifies the filesystem and database, these changes can be undone (files can be deleted, database entries removed).
From the tool's definition Tool description states it "writes a new file to disk and adds it to the local SQLite FTS5 index". The operation creates new markdown or mermaid files in a knowledge base or project directory.
Attacks that exploit this kind of access
Create a new markdown or mermaid file in the knowledge base or project. This operation writes a new file to disk and adds it to the local SQLite FTS5 index. Destination can be. It is categorised as a Write tool in the Kontexta MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Kontexta MCP server in PolicyLayer and add a rule for create_file: 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 Kontexta. Nothing to install.
create_file 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_file 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_file. 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_file is provided by the Kontexta MCP server (safiyu/kontexta). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
create_file is one line of Kontexta's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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