fund_open_fund_info_em

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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=true, covering the safety profile. The description adds the source and the return type (pandas.DataFrame), which is useful, but says nothing beyond annotations about access, rate limits, or data freshness.

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 source line and param/return tags are front-loaded and reasonably efficient, but the URL and Chinese title restate the source redundantly, and the enumeration only appears for period, leaving the structure uneven.

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 3-parameter read-only tool with no output schema and no schema descriptions, the description covers symbol sourcing and period options but omits any list of valid indicator values, which the agent needs to invoke it correctly. Adequate but with a clear gap.

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?

With 0% schema description coverage, the description carries the full burden. It documents symbol (plus where to obtain codes) and enumerates valid period values, which is valuable, but 'indicator' is left as an unexplained '需要获取的指标' with no valid values listed, so a third of the parameters remain semantically opaque.

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?

States a specific source and resource (东方财富网-天天基金网 open-end fund net value data), which is concrete enough to distinguish it from macro/stock/futures siblings. However it does not differentiate itself from close cousins like fund_open_fund_daily_em or fund_open_fund_rank_em, and the vague 'indicator' leaves the exact data scope unclear.

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?

There is no explicit when-to-use or when-not-to-use guidance relative to alternative fund tools. The only operational hint ('可以通过调用 ak.fund_open_fund_daily_em() 获取所有开放式基金代码') tells how to source a symbol, but not when this tool is the right choice over sibling tools.

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