Insert content into a text file at a specific position.
AI agents use insert_text_file_contents to create or update resources in Mcp Text Editor — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp Text Editor environment.
This tool modifies file contents by inserting text at a specified position. The modification is reversible (text can be deleted or replaced later), making it Write rather than Destructive. Severity is medium because unintended insertions could corrupt files or configurations, but the effect is not financial and can be recovered from.
From the tool's definition Tool name 'insert_text_file_contents' and description 'Insert content into a text file at a specific position' indicates the tool creates or modifies file data.
Documented attack patterns abuse exactly the kind of access insert_text_file_contents gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Text Editor, and nothing reaches the server without passing your rules. This is the rule we recommend for insert_text_file_contents:
{
"version": "1",
"default": "deny",
"tools": {
"insert_text_file_contents": {
"limits": [
{
"counter": "insert_text_file_contents_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}insert_text_file_contents 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.
Free to start. No card required.
Insert content into a text file at a specific position. It is categorised as a Write tool in the Mcp Text Editor MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Mcp Text Editor MCP server in PolicyLayer and add a rule for insert_text_file_contents: 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 Mcp Text Editor. Nothing to install.
insert_text_file_contents 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 insert_text_file_contents 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 insert_text_file_contents. 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.
insert_text_file_contents is provided by the Mcp Text Editor MCP server (tumf/mcp-text-editor). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 6 Mcp Text Editor tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
6 Mcp Text Editor tools catalogued and risk-classified — across an index of 42,500+ MCP servers.