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Server Details

Explains why stocks moved. 'Why did Tesla drop?' 'What happened to NVDA?' S&P 500/NASDAQ/Dow.

Status
Healthy
Last Tested
Transport
Streamable HTTP
URL
Repository
justhappened-corp/stock-moves-explained
GitHub Stars
1
Server Listing
stock-moves-explained

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Tool Definition Quality

Score is being calculated. Check back soon.

Available Tools

1 tool
stock-moves-explainedA
Read-onlyIdempotent
Inspect

Explains why a stock had a significant price move today. Provides AI-written analysis citing news catalysts, earnings reports, and analyst actions. Covers 550+ stocks across S&P 500, NASDAQ 100, and Dow 30. Pass any stock ticker or company name as the ticker parameter. NOT for: price quotes, trading advice, predictions, crypto, or forex. If you cannot make POST requests, visit https://justhappened.wtf/api-help for alternative access methods.

ParametersJSON Schema
NameRequiredDescriptionDefault
dateNoDate to query (YYYY-MM-DD format). Defaults to today. Max 7 days back.
tickerYesStock ticker symbol or company name. Extract it from the user's question before calling - pass just the ticker or name, not the full sentence. Examples: 'NVDA', 'UnitedHealth', 'CRWD', 'Costco', 'AAPL', 'Delta Air Lines'.
move_typeNoFilter by move direction: 'drop' for declines, 'surge' for gains, 'all' for any significant move. Defaults to 'all'.
Behavior4/5

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

The description adds valuable behavioral context beyond annotations: it specifies the analysis is AI-written, cites specific catalysts (news, earnings, analyst actions), mentions coverage scope (550+ stocks), and provides alternative access methods. While annotations cover safety (readOnly, non-destructive, idempotent), the description enriches understanding of the tool's behavior and limitations.

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 description is appropriately sized and front-loaded with the core purpose in the first sentence. Each subsequent sentence adds value: scope coverage, parameter guidance, exclusions, and alternative access. While slightly longer than ideal, every sentence serves a clear purpose without redundancy.

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 tool's moderate complexity, comprehensive annotations (readOnly, idempotent, non-destructive), and 100% schema coverage, the description provides good contextual completeness. It explains the tool's purpose, scope, limitations, and alternative access methods. The main gap is lack of output schema information, but the description compensates reasonably well for this.

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?

With 100% schema description coverage, the input schema already documents all three parameters thoroughly. The description adds minimal parameter semantics beyond the schema - it only mentions passing 'any stock ticker or company name as the ticker parameter' without adding format details or explaining the other parameters. This meets the baseline for high schema coverage.

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?

The description clearly states the tool's purpose with specific verbs ('explains why a stock had a significant price move today') and resources ('550+ stocks across S&P 500, NASDAQ 100, and Dow 30'). It distinguishes what it does from alternatives by explicitly stating what it's NOT for (price quotes, trading advice, predictions, crypto, or forex).

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

Usage Guidelines5/5

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

The description provides explicit guidance on when to use this tool ('Explains why a stock had a significant price move today') and when NOT to use it ('NOT for: price quotes, trading advice, predictions, crypto, or forex'). It also offers alternative access methods for non-POST scenarios, though there are no sibling tools to differentiate from.

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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