option_cffex_hs300_daily_sina

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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, so the safety profile is covered. The description adds only that the output is daily-frequency data returned as a pandas.DataFrame; it discloses nothing about rate limits, history depth, or contract expiry handling.

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 docstring format is front-loaded with the purpose line before param/return metadata, and there is no filler. It is slightly boilerplate-heavy but every line conveys usable information.

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 single-parameter, no-output-schema tool with full annotation coverage, the description covers purpose, parameter sourcing, and return type. Nothing critical is missing for an agent to invoke it, though contract-code format detail would make it self-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%, so the description carries the burden and does well: it explains that symbol is a specific contract code including the call/put identifier and directs the agent to a sibling tool for retrieving valid codes. It still does not spell out the literal code format (e.g. 'io2202P4350'), which is why it is not a 5.

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 names a specific verb+resource: daily-frequency quotes (日频行情) for a designated CFFEX CSI 300 index option contract sourced from Sina Finance. It is clearly distinct from the list/spot siblings by specifying '指定合约' and '日频', though it never explicitly names those siblings as alternatives.

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?

It gives a real usage pointer by telling the agent where to obtain the symbol (from option_cffex_hs300_spot_sina's call-identifier), which is more than most. However, it offers no explicit when-to-use vs when-not guidance relative to option_cffex_hs300_list_sina or option_cffex_hs300_spot_sina.

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