# append_cos_preference

Append one durable speech/taste preference for THIS operator only (re-injected on their next voice session mint). Use when they say something was hard to follow, how cards should sound, or "remember I prefer…". For this user_id only — does not edit the shared FreedomOS CoS template. Apply the note in the current call when you can. [write-tier — first use may require a manager's approval; a from-now-on approval makes future calls seamless, a just-once approval re-asks next time.]

Agent View of the PolicyLayer registry record for `append_cos_preference`. HTML page: https://policylayer.com/tools/com-getfreedomos-freedom-mcp/append-cos-preference

## Facts

- Tool: `append_cos_preference`
- Server: Freedom Mcp (`https://twuluxmoognlwtmaoqgo.supabase.co/functions/v1/freedom-mcp`) — https://policylayer.com/tools/com-getfreedomos-freedom-mcp.md
- Homepage: https://github.com/https://twuluxmoognlwtmaoqgo.supabase.co/functions/v1/freedom-mcp
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server CORS policy: *
- Server rate-limited: no
- Parameters: 2 (1 required)
- Recommended policy verdict: Rate-limited

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `note` | string | yes | One short preference (≤500 chars), e.g. "When describing cards, paraphrase titles — do not read dashes or ids aloud." |
| `companyId` | string | no | FreedomOS company id to act within (you must be a member). Required for company-scoped tools. |

Parameters from the server's own tool schema.

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

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "append_cos_preference",
    "arguments": {
      "note": "<note>"
    }
  }
}
```

## Why append_cos_preference is rated Medium

This tool creates or modifies user-specific preference data (appends a preference record that persists across sessions). It is reversible and has no destructive, financial, or code-execution properties. The scope is limited to individual operator preferences with no blast radius beyond personalization settings. The note that first use may require manager approval confirms it is a Write operation (not Execute).

From the tool's own definition: "Append one durable speech/taste preference for THIS operator only... Use when they say something was hard to follow, how cards should sound, or 'remember I prefer…'. For this user_id only — does not edit the shared FreedomOS CoS template."

## Use case

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

## Recommended policy (PolicyLayer)

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

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

## Other tools on Freedom Mcp (237)

- `clear_pipeline_learnings` — Destructive — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/clear-pipeline-learnings.md
- `deactivate_agent` — Destructive — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/deactivate-agent.md
- `delete_icp` — Destructive — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/delete-icp.md
- `delete_idea` — Destructive — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/delete-idea.md
- `delete_knowledge` — Destructive — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/delete-knowledge.md
- `delete_objective` — Destructive — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/delete-objective.md
- `remove_agent_activity` — Destructive — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/remove-agent-activity.md
- `remove_background` — Destructive — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/remove-background.md
- `remove_dashboard_widget` — Destructive — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/remove-dashboard-widget.md
- `audit_brand_visibility` — Execute — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/audit-brand-visibility.md
- `browse_url` — Execute — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/browse-url.md
- `challenge_as_customer` — Execute — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/challenge-as-customer.md
- `decide_command_center_item` — Execute — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/decide-command-center-item.md
- `deliberate` — Execute — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/deliberate.md
- `generate_image_xai` — Execute — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/generate-image-xai.md
- `generate_vector_image` — Execute — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/generate-vector-image.md
- `generate_video_veo` — Execute — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/generate-video-veo.md
- `hire_agent` — Execute — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/hire-agent.md
- `hire_agent_with_context` — Execute — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/hire-agent-with-context.md
- `invoke_integration` — Execute — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/invoke-integration.md
- `posthog_hogql` — Execute — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/posthog-hogql.md
- `request_attention_spawn` — Execute — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/request-attention-spawn.md
- `resolve_work` — Execute — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/resolve-work.md
- `run_quality_check` — Execute — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/run-quality-check.md
- `run_tactic` — Execute — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/run-tactic.md
- `send_email` — Execute — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/send-email.md
- `toggle_agent_schedule` — Execute — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/toggle-agent-schedule.md
- `trigger_agent_activity` — Execute — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/trigger-agent-activity.md
- `set_meta_ad_status` — Financial — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/set-meta-ad-status.md
- `update_meta_ad_budget` — Financial — https://policylayer.com/tools/com-getfreedomos-freedom-mcp/update-meta-ad-budget.md
- …and 207 more: https://policylayer.com/tools/com-getfreedomos-freedom-mcp.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=com-getfreedomos-freedom-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/com-getfreedomos-freedom-mcp