egx_index_analysis

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

Annotations already declare readOnlyHint=true and destructiveHint=false, and the description is consistent with a read-only analysis tool. It adds some context about output (constituent performance, full indicators) but does not disclose limitations like data freshness, rate limits, or whether results are real-time.

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 appropriately concise: a single leading sentence stating the purpose, followed by a compact, front-loaded list of parameters. Every sentence adds value with no redundancy or filler.

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?

For a simple tool with three optional parameters and no output schema, the description covers the essential information for invocation: valid parameter values, defaults, and what the tool does. It could be more complete by clarifying what 'full indicators' means or by mentioning the response format, but it is largely sufficient.

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%, yet the description fully compensates by explaining each parameter in the Args section: index lists all valid values, timeframe lists accepted strings and the default, and limit clarifies its meaning and maximum. This is essential because the schema only provides defaults without any descriptions or enums.

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 states a clear verb ('Analyse') and resource ('an EGX index') and mentions 'constituent performance with full indicators,' which gives a sense of the output. However, it does not explicitly distinguish this tool from siblings like egx_market_overview or egx_sector_scan, and the phrase 'full indicators' is vague.

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 when an agent needs to analyze an EGX index, but it does not provide explicit context or alternatives. There is no guidance on when to prefer this over related tools like egx_market_overview or egx_stock_screener, leaving the agent to infer suitability.

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