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CoinRithm Agent Trading

by com.coinrithm.mcp
OverviewDiscussionsAdmin

Prediction-market quote

pm_quote
Read-only

Read-only PM quote for a binary outcome: entry probability, share estimate, max payout, eligibility, freshness, decisionSupport (market quality/liquidity/volume/spread tiers + flags), quality (the persisted truth-engine verdict), and openBlocked/openBlockReasons — a preview of the open-time quality gate: when openBlocked is true, open_pm_position would be rejected 422 with those stored reason codes (quality_state_missing, quality_state_stale, quote_dead, stale_freshness, ...). Never mutates state. stakeMusd must be > 0 (min to open is 10). Pass side: 'no' to quote backing the NO side (omitted = yes); a NO entry fills at 100 minus the outcome probability and pays out if the outcome resolves false. 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
sideNoWhich side of the binary outcome to back. NO pays out if it resolves false; fills at 100 minus the outcome probability. Omitted = yes.
slugYesEvent slug.
sourceYesSource slug (e.g. kalshi, polymarket).
stakeMusdYesmUSD to stake (> 0).
agentTraceNoOptional private trace metadata stored in the caller's ledger.
bankrollMusdNoOptional bankroll in mUSD for the advisory suggested stake.
forecastProbabilityNoOptional own probability that the selected side wins (0-100 exclusive) for advisory edge sizing.
outcomeExternalMarketIdYesCase-sensitive outcome / market id.

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. Changed2 schema fields changed
    • addedInput schema / properties / bankrollMusd
      Added value: +{
+  "description": "Optional bankroll in mUSD for the advisory suggested stake.",
+  "exclusiveMinimum": 0,
+  "type": "number"
+}
    • addedInput schema / properties / forecastProbability
      Added value: +{
+  "description": "Optional own probability that the selected side wins (0-100 exclusive) for advisory edge sizing.",
+  "exclusiveMaximum": 100,
+  "exclusiveMinimum": 0,
+  "type": "number"
+}
  3. Changed1 schema field changed
    • addedInput schema / properties / side
      Added value: +{
+  "description": "Which side of the binary outcome to back. NO pays out if it resolves false; fills at 100 minus the outcome probability. Omitted = yes.",
+  "enum": [
+    "yes",
+    "no"
+  ],
+  "type": "string"
+}
  4. 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"
+  ]
+}
  5. 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"
+}
  6. First observed

TDQS

A4.6/5.0
Behavior5/5

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

Goes well beyond annotations: 'Never mutates state', paper-trading-only (virtual mUSD), fills follow paper_execution_v1 with a disclosed execution cost, min-to-open is 10, and it discloses specific 422 reject codes (quality_state_missing, quality_state_stale, quote_dead, stale_freshness). This is exactly the kind of behavioral context annotations cannot carry.

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 purpose and scope before the long field enumeration, and every sentence carries substantive information. It is dense and the list of decisionSupport/quality subfields partly duplicates what the output schema already exposes, keeping it short of a 5.

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

Completeness5/5

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

For a read tool with 8 params, an output schema, and nested objects, the description covers intent, trade-safety semantics, gating behavior, execution model, and error previews. Nothing an agent needs in order to invoke and interpret it correctly is missing.

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 baseline is 3, but the description adds real meaning: the stakeMusd > 0 floor plus the 'min to open is 10' threshold and the side='no' payoff/fill mechanics (fills at 100 minus probability, pays if resolved false), which are not stated in the schema for the minimum.

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

Purpose5/5

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

States a specific verb+resource ('Read-only PM quote for a binary outcome') and enumerates the quote's contents, so an agent can immediately tell it apart from pm_data_* reads and from open_pm_position.

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

Usage Guidelines4/5

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

Explicitly names the related sibling and the condition that routes to it: when openBlocked is true, open_pm_position would be rejected 422 with the stored reason codes, making this a pre-trade gate preview. It doesn't state when NOT to use this tool versus the pm_data_* family, so it stops short of a 5.

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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