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

With no annotations provided, the description carries the full burden of behavioral disclosure, yet it only lists data components. The term 'merged proxy' is unexplained jargon, and the description does not state what the output looks like, whether any transformation or aggregation occurs, how the limit interacts with the multi-section return, or whether this is purely a read operation.

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 efficient sentence that front-loads the core purpose and lists the delivered sections. It loses a point because the unexplained 'merged proxy' jargon and the missing parameter semantics force an agent to seek clarification elsewhere.

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 relatively simple tool with one optional parameter and no output schema, the description does enumerate the components of the result, which is helpful. However, it leaves the 'merged proxy' term undefined and fails to clarify the limit parameter, so an agent cannot confidently call it correctly without external context.

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% and the description does not mention the single parameter 'limit' at all. An agent cannot know what limit constrains (rows, days, entries per section) or how it interacts with the multiple breakdowns the tool returns, so the description adds zero meaning beyond the bare schema default of 60.

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 specific verb-resource pair ('A-share ETF capital flow overview') and enumerates the components included (merged proxy, ETF inflow, margin balance history, sectors and ETF breakdown). This scope clearly distinguishes it from sibling tools such as get_stock_ohlc, get_cmp_overview, and get_macro_indicators, which target different data domains.

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 provided on when to use this tool versus any of the 50+ sibling tools. There is no mention of exclusions, prerequisites, or alternative tools for related queries like broader market flow or individual stock flow, leaving the agent to infer applicability 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.