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CoinRithm Agent Trading

by com.coinrithm.mcp
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Get positions

get_positions
Read-only

List open + historical positions for a venue. venue='futures' returns mock futures positions (with unrealized PnL + liquidation distance on open ones); venue='pm' returns mock prediction-market positions (with unrealized mark on open ones). Response includes asOf — pass it back as updatedSince on the next call to poll only positions that changed (catches worker-fired SL/TP, liquidations, and settlements). Paper trading only (virtual mUSD). Fills follow paper_execution_v1 with a disclosed execution cost; see executionModel in quote/trade results.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
venueYesWhich venue's positions to list.
agentTraceNoOptional private trace metadata stored in the caller's ledger.
updatedSinceNoISO 8601 cursor: only positions whose row changed since this instant. Pass the previous response's asOf back here.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
okYes
bodyNo
httpStatusYes
ledgerStatusNo
ledgerEventIdNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed5 schema fields changed
    • removedOutput schema / properties / body / description
      Removed value: -"Parsed CoinRithm response body, or raw text when the response is not JSON."
    • removedOutput schema / properties / httpStatus / description
      Removed value: -"HTTP status returned by CoinRithm, or 0 for network errors."
    • removedOutput schema / properties / ledgerEventId / description
      Removed value: -"Private AgentActionEvent id returned by /api/agent/*, when present."
    • removedOutput schema / properties / ledgerStatus / description
      Removed value: -"Ledger write status header returned by CoinRithm, when present."
    • removedOutput schema / properties / ok / description
      Removed value: -"True when CoinRithm returned a successful 2xx response."
  2. Changed3 schema fields changed
    • addedInput schema / properties / agentTrace
      Added value: +{
+  "additionalProperties": false,
+  "description": "Optional private trace metadata stored in the caller's ledger.",
+  "properties": {
+    "confidence": {
+      "description": "Optional confidence score from 0 to 1.",
+      "maximum": 1,
+      "minimum": 0,
+      "type": "number"
+    },
+    "decisionId": {
+      "description": "Agent decision id for quote/write attribution.",
+      "minLength": 1,
+      "type": "string"
+    },
+    "rationaleSummary": {
+      "description": "Optional concise rationale summary. Do not include chain-of-thought, secrets, or account identity.",
+      "maxLength": 1200,
+      "minLength": 1,
+      "type": "string"
+    },
+    "runId": {
+      "description": "Agent run id for grouping.",
+      "minLength": 1,
+      "type": "string"
+    },
+    "strategyLabel": {
+      "description": "Short strategy label, self-reported by the caller.",
+      "maxLength": 120,
+      "minLength": 1,
+      "type": "string"
+    }
+  },
+  "type": "object"
+}
    • addedOutput schema / properties / ledgerEventId
      Added value: +{
+  "description": "Private AgentActionEvent id returned by /api/agent/*, when present.",
+  "type": [
+    "string",
+    "null"
+  ]
+}
    • addedOutput schema / properties / ledgerStatus
      Added value: +{
+  "description": "Ledger write status header returned by CoinRithm, when present.",
+  "type": [
+    "string",
+    "null"
+  ]
+}
  3. Changed1 schema field changed
    • addedInput schema / properties / updatedSince
      Added value: +{
+  "description": "ISO 8601 cursor: only positions whose row changed since this instant. Pass the previous response's asOf back here.",
+  "type": "string"
+}
  4. Changed1 schema field changed
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": false,
+  "properties": {
+    "body": {
+      "description": "Parsed CoinRithm response body, or raw text when the response is not JSON."
+    },
+    "httpStatus": {
+      "description": "HTTP status returned by CoinRithm, or 0 for network errors.",
+      "type": "integer"
+    },
+    "ok": {
+      "description": "True when CoinRithm returned a successful 2xx response.",
+      "type": "boolean"
+    }
+  },
+  "required": [
+    "httpStatus",
+    "ok"
+  ],
+  "type": "object"
+}
  5. First observed

TDQS

A4/5.0
Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already cover the read-only/non-destructive safety profile, and the description layers on substantial extra context: paper-trading-only (virtual mUSD), the venue-specific payload composition, the cursor round-trip contract, and the paper_execution_v1 cost model with a pointer to executionModel. This is well beyond what the structured fields disclose.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Front-loaded with the core action and scope, then progressively the venue branches and cursor mechanics. Dense but every sentence carries information; minor cost is that the paper-trading/execution-model caveat is packed onto the end.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With an output schema present, return-value detail is not needed, and the description still covers venue behavior, the polling cursor, and the paper-trading constraint. Complete enough for correct invocation; only the sibling-routing gap keeps it from top marks.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so the baseline is 3, but the description adds meaning the schema lacks: it explains the asOf/updatedSince round-trip pattern tying the response cursor to the input param, and characterizes what each venue enum value returns.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb (List) plus resource (open + historical positions) and scope (for a venue), then differentiates the two venue modes with concrete return contents. It is clearly distinguishable from order/trade tools by resource, though it never names a sibling (e.g. get_portfolio, get_my_trades) to route the agent explicitly.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Provides real usage mechanics: pass the response's asOf back as updatedSince to poll only changed rows, and notes this catches SL/TP fires, liquidations and settlements. However it gives no when-to-use-vs-alternative guidance, so an agent must infer this tool's place against get_portfolio, get_my_trades and list_open_orders.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

All CoinRithm Agent Trading toolsInspect
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