QuantApe Markets

find_symbol_lists

Read-only

Every stock screen a given ticker is currently in — its momentum, technical-signal, earnings, theme and thesis memberships, in one call. Free within your daily allowance (anonymous 5/day by IP, signed-in users 10/day, power users 50/day); beyond that $0.01 per call via x402 (USDC).

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "symbol": "<symbol>"
    },
    "name": "find_symbol_lists"
  }
}

Input Schema

Name	Required	Description	Default
`symbol`	Yes	Ticker symbol, e.g. NVDA or BRK-B.

Output Schema

Name	Required	Description	Default
`lists`	Yes
`symbol`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedSep 22, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "additionalProperties": {},
+  "properties": {
+    "lists": {
+      "items": {
+        "additionalProperties": {},
+        "properties": {
+          "as_of": {
+            "description": "Screen last rebuilt, ISO 8601 UTC",
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "display_name": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "list_id": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "list_id",
+          "display_name",
+          "as_of"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "symbol": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "symbol",
+    "lists"
+  ],
+  "type": "object"
+}

First observedSep 10, 2026

TDQS

A3.8/5.0

Behavior4/5

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

Annotations only provide readOnlyHint=true, and the description does not contradict that. It adds useful behavioral context: daily free quotas for anonymous, signed-in, and power users, plus the paid x402/USDC path beyond the limit. It does not cover empty-result or error behavior, but the output schema and readOnly annotation lessen that gap.

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?

The purpose is front-loaded in the first sentence, and the second sentence packs quota and pricing information compactly. The quota detail is relevant but somewhat dense; still, there is no filler or redundancy.

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 tool with one required parameter, a fully documented schema, an output schema, and a readOnly annotation, the description provides enough information to call it correctly. It explains the purpose, enumerates membership categories, and covers quota/payment behavior, so nothing critical is missing.

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

Parameters3/5

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

Schema coverage is 100% and the input schema already documents the single `symbol` parameter with an example. The description adds only the phrase 'given ticker' and no additional format, case, or usage nuance beyond the schema, so the baseline 3 applies.

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?

The description clearly identifies the tool's purpose: return all stock-screen memberships for a given ticker, including momentum, technical, earnings, theme, and thesis lists. It is specific about the resource and scope, though it never explicitly names a sibling tool or uses an explicit verb like 'find' or 'list'.

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?

The intended use is implied: when an agent needs every screen a ticker currently belongs to, this is the tool. However, it does not contrast itself with sibling tools such as list_smart_lists, get_smart_list, or get_list_criteria, nor does it say when not to use it.

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

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