egx_market_overview

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

Annotations already declare readOnlyHint, openWorldHint, and destructiveHint, so the safety profile is covered. The description adds no behavioral details such as data source, real-time nature, or pagination behavior, beyond the fact that it returns an overview. Thus it provides little value beyond the annotations.

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 compact and well-structured, leading with a one-sentence purpose followed by an 'Args:' block listing each parameter with its semantics. No filler or redundant statements, making it highly efficient.

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 has no output schema, the description should at least hint at what the response contains, but it doesn't. There's no mention of what categories are included, whether it returns indices, top movers, or other data. The tool is simple enough that this lack may be tolerable, but it still leaves the agent guessing about the return format.

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?

Schema description coverage is 0%, so the description must compensate for the lack of parameter documentation in the schema. It does this by explaining the allowed values for timeframe (5m to 1M) with a default, and stating that limit is the 'Number of stocks per category' with a max of 20. This gives the agent sufficient semantic understanding of both parameters, though it doesn't explain how they affect the output.

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 it provides a 'comprehensive overview of the Egyptian Exchange (EGX) market,' which is a specific verb and resource. It distinguishes itself from sibling tools like egx_sector_scan or egx_index_analysis by focusing on the overall market rather than a specific segment. However, it doesn't enumerate exactly what 'overview' includes, so it's not maximally specific.

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?

The description offers no guidance on when to use this tool versus alternatives. It merely states the tool's function and its parameters, without mentioning exclusions or related tools like market_snapshot or egx_sector_scan. Even implied usage context is absent.

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