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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, and the description's trailing 'Read-only' merely restates them. Beyond that, it adds real context: where each price originates (Uniswap v4 swaps, DEX price, Robinhood quote), the hook-guaranteed floor for FOBO tokens, and that stale/non-live quotes are flagged with a warning. That provenance and freshness information is not derivable from the annotations.

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?

Everything is packed into one very long compound sentence, so the core fact (live ETH price per token) is front-loaded but the rest must be unpacked by the reader. It is dense rather than padded, though splitting the return fields into a short list would make it easier to scan.

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?

With no output schema and only one optional parameter, the description carries the return-value burden and does so fully, effectively spelling out the response contract: price, 1h change, source, floor price, session state, and staleness warning. An agent knows what it will get back and how to interpret non-live quotes.

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 coverage is 100% and the single parameter already documents 'Symbols to include; all when omitted', so the schema carries the meaning. The description's 'for every listed token with a feed' reinforces the default-scope behavior but adds no syntax, limit, or ordering detail beyond the schema.

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 (live ETH price per token) and enumerates the exact fields returned: 1h change, source, floor price for FOBO tokens, and session state for stock tokens. That is far more specific than the title alone. It does not name a sibling to contrast with (e.g. get_chart for historical data), so it stops short of full differentiation.

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?

Usage is only implied: the word 'live' signals spot pricing as opposed to charting or activity history, and the schema note 'all when omitted' hints at the no-argument case. There is no explicit when-to-use / when-not-to-use statement and no pointer to alternatives such as get_chart or list_tokens.

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