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longbridge

longbridge

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Top Movers

top_movers
Read-onlyIdempotent

Identifies stocks with price moves exceeding 20-day standard deviation, along with related news. Filters by market and sorts by time, magnitude, or popularity.

Instructions

Get stocks whose price fluctuation exceeds the 20-trading-day standard deviation, with correlated news reasons. markets: comma-separated HK/US/CN/SG (omit=all). sort: 0=time 1=change-magnitude 2=popularity/heat (default).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
dateNoDate to query in "YYYY-MM-DD" format. Omit for today's movers.
sortNoSort order (default: "2"): "0" = by time (most recent first) "1" = by price change magnitude (largest move first) "2" = by popularity (most-viewed first)
limitNoNumber of events to return per page (default: 20, max: 100)
marketsNoMarket filter: comma-separated list of markets to include. Supported values: "HK", "US", "CN", "SG". Omit to return all markets. Example: "HK,US"
next_paramsNoPagination cursor from previous response next_params field. Pass the entire next_params object returned by the previous call to get the next page. Omit for the first page.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
eventsNo
updated_atNo
next_paramsNo
Behavior4/5

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

Annotations already indicate read-only, idempotent, and non-destructive behavior. The description adds value by specifying the 20-trading-day standard deviation threshold and the inclusion of correlated news reasons, providing behavioral context beyond annotations.

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

Conciseness5/5

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

Two sentences that efficiently convey the tool's purpose and key parameter options with no unnecessary words.

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?

Given the rich schema and output schema, the description adequately covers core functionality and important parameters. It could mention date pagination, but these are documented in the schema.

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 description coverage is 100%, so baseline is 3. The description redundantly summarizes the markets and sort parameters but does not add significant new meaning beyond what the schema already provides.

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?

Clearly states the tool retrieves stocks with price fluctuation exceeding 20-trading-day standard deviation along with correlated news reasons. The description of markets and sort parameters further clarifies the scope. This distinguishes it from siblings like quote or news tools.

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

Usage Guidelines2/5

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

No explicit when-to-use or when-not-to-use guidance is provided. There is no mention of alternatives or context in which this tool is preferred over other stock or news tools.

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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