# Tool catalog — yieldsentinel.eth

MCP Streamable HTTP + discovery/identity only — not an A2A message/send runtime.

| Tool | Purpose |
|------|---------|
| `health` | Liveness, flags, usage counts, research vintage. May ping yieldhunter to refresh vintage. Not a policy verdict. |
| `check_position` | Evaluate one described position against a research policy. Returns PolicyVerdict + A2H. |

**Presets:** `treasury-conservative` (excludes RWA) · `balanced-research` · `rwa-selective` (RWA allowed, not a free pass; `requireCurated` = YS allowlist).

How to call: [/discovery/how-agents-call.md](./how-agents-call.md) · context: [/discovery/agent-context.md](./agent-context.md)

Research only. Scoring ≠ policy approval.