egx_index_analysis

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

No annotations are provided, so the description carries the full burden. It states the tool returns index-level statistics and per-stock breakdown, but does not disclose whether it is read-only, any authentication or rate-limit requirements, or potential data freshness issues. This is minimal behavioral disclosure for a tool with no annotation support.

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 well-structured: a one-sentence summary, a return-type line, and a clear Args list. Each sentence earns its place, and the Args section is detailed yet not bloated. The front-loading of the purpose makes it immediately understandable.

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?

The tool has no output schema or annotations, so the description needs to cover purpose, parameters, and return value. It does all three reasonably well. It could add examples or state that it is a read-only analysis, but the core information is present for a tool of this complexity.

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. It thoroughly explains each parameter: index with enumerated values and descriptions, timeframe with allowed values and default, and limit with meaning and max value. This adds significant value beyond the bare schema.

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 'Analyze an EGX index showing constituent performance with full indicators' and specifies outputs ('index-level statistics and per-stock breakdown'). It uses a specific verb and resource, but does not explicitly differentiate from sibling tools like egx_market_overview or egx_sector_scan.

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 implies usage context (when you need EGX index analysis) but provides no explicit guidance on when to use this tool versus alternatives, nor any exclusions. Sibling tools like egx_market_overview or egx_sector_scan could overlap, and the description does not clarify selection criteria.

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