# cost_model

Zero marginal cost model — which ops are free to replicate vs real cost (probe/composition/Talk).

Agent View of the PolicyLayer registry record for `cost_model`. HTML page: https://policylayer.com/tools/dev-dualregistry-registry/cost-model

## Facts

- Tool: `cost_model`
- Server: Dual Registry (`https://www.dualregistry.dev/api/protocol`) — https://policylayer.com/tools/dev-dualregistry-registry.md
- Homepage: https://github.com/manhatton31-svg/dualregistry
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server CORS policy: *
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

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

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

## Why cost_model is rated Low

Even though cost_model only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

## Use case

AI agents call cost_model to retrieve information from Dual Registry without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Dual Registry:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "cost_model": {}
  }
}
```

## Other tools on Dual Registry (63)

- `execute_compose` — Execute — https://policylayer.com/tools/dev-dualregistry-registry/execute-compose.md
- `run_loop_tick` — Execute — https://policylayer.com/tools/dev-dualregistry-registry/run-loop-tick.md
- `deposit_outcome` — Financial — https://policylayer.com/tools/dev-dualregistry-registry/deposit-outcome.md
- `abundance_rank` — Read — https://policylayer.com/tools/dev-dualregistry-registry/abundance-rank.md
- `ard_search` — Read — https://policylayer.com/tools/dev-dualregistry-registry/ard-search.md
- `attest` — Read — https://policylayer.com/tools/dev-dualregistry-registry/attest.md
- `attractor_targets` — Read — https://policylayer.com/tools/dev-dualregistry-registry/attractor-targets.md
- `bind_identity` — Read — https://policylayer.com/tools/dev-dualregistry-registry/bind-identity.md
- `capability_hash` — Read — https://policylayer.com/tools/dev-dualregistry-registry/capability-hash.md
- `check_liveness` — Read — https://policylayer.com/tools/dev-dualregistry-registry/check-liveness.md
- `check_status` — Read — https://policylayer.com/tools/dev-dualregistry-registry/check-status.md
- `co_sign_founding` — Read — https://policylayer.com/tools/dev-dualregistry-registry/co-sign-founding.md
- `collab_access_status` — Read — https://policylayer.com/tools/dev-dualregistry-registry/collab-access-status.md
- `collab_session_claim` — Read — https://policylayer.com/tools/dev-dualregistry-registry/collab-session-claim.md
- `collab_session_join` — Read — https://policylayer.com/tools/dev-dualregistry-registry/collab-session-join.md
- `collab_session_result` — Read — https://policylayer.com/tools/dev-dualregistry-registry/collab-session-result.md
- `compose_peers` — Read — https://policylayer.com/tools/dev-dualregistry-registry/compose-peers.md
- `endorse` — Read — https://policylayer.com/tools/dev-dualregistry-registry/endorse.md
- `follow_trail` — Read — https://policylayer.com/tools/dev-dualregistry-registry/follow-trail.md
- `get_acceleration` — Read — https://policylayer.com/tools/dev-dualregistry-registry/get-acceleration.md
- `get_agent_runs` — Read — https://policylayer.com/tools/dev-dualregistry-registry/get-agent-runs.md
- `get_co_sign_pairs` — Read — https://policylayer.com/tools/dev-dualregistry-registry/get-co-sign-pairs.md
- `get_exonomics` — Read — https://policylayer.com/tools/dev-dualregistry-registry/get-exonomics.md
- `get_feedback_pricing` — Read — https://policylayer.com/tools/dev-dualregistry-registry/get-feedback-pricing.md
- `get_founding_deal` — Read — https://policylayer.com/tools/dev-dualregistry-registry/get-founding-deal.md
- `get_incentives` — Read — https://policylayer.com/tools/dev-dualregistry-registry/get-incentives.md
- `get_platform_cost` — Read — https://policylayer.com/tools/dev-dualregistry-registry/get-platform-cost.md
- `get_reciprocity` — Read — https://policylayer.com/tools/dev-dualregistry-registry/get-reciprocity.md
- `hyper_index` — Read — https://policylayer.com/tools/dev-dualregistry-registry/hyper-index.md
- `improve_kernel` — Read — https://policylayer.com/tools/dev-dualregistry-registry/improve-kernel.md
- …and 33 more: https://policylayer.com/tools/dev-dualregistry-registry.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=dev-dualregistry-registry · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/dev-dualregistry-registry