get_market_rates

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

The description clearly states it is a read operation ('Get') and that it requires no authentication. This adequately conveys the behavioral trait of being a public, read-only endpoint. However, it lacks details on rate limits, data freshness, or scope of tokens/pools covered, which would enhance transparency.

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 two short sentences, each serving a purpose: stating the action and a key property (no auth). No verbosity or redundancy. It is optimally concise for a simple tool.

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?

Given the tool has no parameters, no output schema, and no annotations, the description provides only the bare minimum. While it is clear, it could benefit from mentioning the return format or coverage (e.g., 'returns a list of token symbols and their current price in USD') to be fully complete for an agent.

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?

There are zero parameters, and the input schema is fully covered with no required fields. According to guidelines, 0 parameters warrants a baseline of 4. The description adds no extra param info, which is acceptable as none exist.

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 uses a specific verb 'Get' and clearly identifies the resources 'current token prices and lending pool rates'. It distinguishes from siblings like 'get_market_depth' which focuses on order book depth, and 'get_cc_market' which is for credit coin market data. The purpose is unambiguous.

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 notes 'No api_key required', hinting at ease of use, but provides no guidance on when to use this tool vs alternatives like 'get_market_depth' or 'get_cc_market'. There is no mention of preconditions or typical scenarios for invocation.

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