market_status

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

With no annotations provided, the description must fully disclose behavior. It only states the output is 'open or closed' but does not clarify whether the status is real-time, delayed, or based on a specific date/timezone, nor does it describe the response format beyond the binary outcome. This is minimal disclosure for a tool that might have nuances around market hours and holidays.

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

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

The description is a single sentence that is fully front-loaded and contains no filler. Every word contributes to conveying the tool's core purpose, making it exceptionally concise.

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

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

Given the tool's low complexity (zero parameters, no output schema), the description provides adequate information for basic selection and invocation. It states the tool returns the current NSE market status as open or closed, which is sufficient for a simple status check. However, it could be more complete by mentioning whether it reflects the official trading session or if it has any latency.

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

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

The tool has zero parameters, so the baseline is 4. The description adds no parameter information because there are none to document, and the schema is empty, leaving no ambiguity about inputs.

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

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

The description clearly states the tool provides the current NSE market status, indicating whether it is open or closed. This is a specific resource (NSE market) and a definable outcome, distinguishing it from siblings like index_pe_history or stock_quote. It lacks an explicit verb like 'retrieve' or 'get,' but the intent is unambiguous.

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

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

No guidance is given on when to use this tool versus alternatives such as pre_open_market or holiday_list. The description does not mention exclusions, prerequisites, or scenarios where this tool is preferred, leaving the agent to infer appropriateness from the name alone.

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