# write_agent_file

Create or overwrite a file in an owned agent

Agent View of the PolicyLayer registry record for `write_agent_file`. HTML page: https://policylayer.com/tools/io-github-proagentstore-platform/write-agent-file

## Facts

- Tool: `write_agent_file`
- Server: ProAgentStore (`https://mcp.proagentstore.online/mcp`) — https://policylayer.com/tools/io-github-proagentstore-platform.md
- Homepage: https://github.com/ProAgentStore/platform
- Risk category: Write (Medium risk)
- Registry record: grade D, identity unverified
- Server auth posture: gated
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "write_agent_file",
    "arguments": {}
  }
}
```

## Why write_agent_file is rated Medium

This tool creates or modifies files within an agent system, which is reversible (files can be edited or deleted later). It is categorized as Write rather than Destructive because overwriting is not necessarily irreversible—the previous content could potentially be recovered or the file re-edited.

From the tool's own definition: "Tool description explicitly states 'Create or overwrite a file in an owned agent'. The 'overwrite' capability indicates modification of existing data."

## Use case

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

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches ProAgentStore:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "write_agent_file": {
      "limits": [
        {
          "counter": "write_agent_file_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on ProAgentStore (242)

- `cancel_instance_task` — Destructive — https://policylayer.com/tools/io-github-proagentstore-platform/cancel-instance-task.md
- `clear_finished_tasks` — Destructive — https://policylayer.com/tools/io-github-proagentstore-platform/clear-finished-tasks.md
- `clear_instance_messages` — Destructive — https://policylayer.com/tools/io-github-proagentstore-platform/clear-instance-messages.md
- `clear_instance_voice_settings` — Destructive — https://policylayer.com/tools/io-github-proagentstore-platform/clear-instance-voice-settings.md
- `coding_loop_queue_cancel` — Destructive — https://policylayer.com/tools/io-github-proagentstore-platform/coding-loop-queue-cancel.md
- `coding_repo_remove` — Destructive — https://policylayer.com/tools/io-github-proagentstore-platform/coding-repo-remove.md
- `delete_agent` — Destructive — https://policylayer.com/tools/io-github-proagentstore-platform/delete-agent.md
- `delete_agent_knowledge` — Destructive — https://policylayer.com/tools/io-github-proagentstore-platform/delete-agent-knowledge.md
- `delete_agent_task` — Destructive — https://policylayer.com/tools/io-github-proagentstore-platform/delete-agent-task.md
- `delete_connection` — Destructive — https://policylayer.com/tools/io-github-proagentstore-platform/delete-connection.md
- `delete_feedback` — Destructive — https://policylayer.com/tools/io-github-proagentstore-platform/delete-feedback.md
- `delete_instance_connector_grant` — Destructive — https://policylayer.com/tools/io-github-proagentstore-platform/delete-instance-connector-grant.md
- `delete_instance_file` — Destructive — https://policylayer.com/tools/io-github-proagentstore-platform/delete-instance-file.md
- `delete_instance_knowledge` — Destructive — https://policylayer.com/tools/io-github-proagentstore-platform/delete-instance-knowledge.md
- `delete_instance_memory` — Destructive — https://policylayer.com/tools/io-github-proagentstore-platform/delete-instance-memory.md
- `delete_instance_message` — Destructive — https://policylayer.com/tools/io-github-proagentstore-platform/delete-instance-message.md
- `delete_instance_task` — Destructive — https://policylayer.com/tools/io-github-proagentstore-platform/delete-instance-task.md
- `delete_instance_trigger` — Destructive — https://policylayer.com/tools/io-github-proagentstore-platform/delete-instance-trigger.md
- `delete_supervision` — Destructive — https://policylayer.com/tools/io-github-proagentstore-platform/delete-supervision.md
- `forget_runner_node` — Destructive — https://policylayer.com/tools/io-github-proagentstore-platform/forget-runner-node.md
- `remove_repo` — Destructive — https://policylayer.com/tools/io-github-proagentstore-platform/remove-repo.md
- `unregister_instance_runtime` — Destructive — https://policylayer.com/tools/io-github-proagentstore-platform/unregister-instance-runtime.md
- `answer_instance_input` — Execute — https://policylayer.com/tools/io-github-proagentstore-platform/answer-instance-input.md
- `answer_instance_mcp_input_request` — Execute — https://policylayer.com/tools/io-github-proagentstore-platform/answer-instance-mcp-input-request.md
- `apply_to_job` — Execute — https://policylayer.com/tools/io-github-proagentstore-platform/apply-to-job.md
- `approve_instance_task` — Execute — https://policylayer.com/tools/io-github-proagentstore-platform/approve-instance-task.md
- `call_instance_tool` — Execute — https://policylayer.com/tools/io-github-proagentstore-platform/call-instance-tool.md
- `chat_with_agent` — Execute — https://policylayer.com/tools/io-github-proagentstore-platform/chat-with-agent.md
- `chat_with_instance` — Execute — https://policylayer.com/tools/io-github-proagentstore-platform/chat-with-instance.md
- `coding_engine_reauth` — Execute — https://policylayer.com/tools/io-github-proagentstore-platform/coding-engine-reauth.md
- …and 212 more: https://policylayer.com/tools/io-github-proagentstore-platform.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=io-github-proagentstore-platform · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-proagentstore-platform