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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, so the safety profile is covered. The description adds a non-custodial statement, but the claim that it 'returns quotes and UNSIGNED transactions only' is generic desk boilerplate that does not describe this read-only state lookup and could confuse an agent about what the call actually returns.

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 purpose statement is front-loaded and the field list is efficient. The trailing sentences ('Non-custodial... never moves funds', 'Education only, not financial advice') are disclaimer boilerplate that does little for an agent deciding whether to call a read-only pool-state 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?

With 3 parameters, none required, no output schema and no enum constraints, the description covers the broad shape of the response and the two input modes. It does not say what happens when both optional modes are omitted, nor how route discovery is scoped to 'current' pools, leaving a gap for a parametrically loose tool.

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 67%: from/to carry enum-like symbol lists, but pool_id has no description at all. The description usefully clarifies the either/or semantics (pool_id lookups vs. from->to route discovery), which the schema does not express, but it adds no format or validity detail for pool_id itself.

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 verb+resource ('Read-only Cetus CLMM pool state ... by pool_id') and enumerates the returned fields (coins, fee rate, tick spacing, liquidity, tick, price). It is clear what the tool does, though it does not name the near-neighbour siblings (get_pool_params, get_pool_stats, list_pools) to sharpen the boundary.

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 implies two usage modes — look up one pool by pool_id, or discover pools on the current from->to route — which is real guidance. But it never states when to prefer this over list_pools, get_pool_params or get_pool_stats, so the agent must infer the split from the sibling names alone.

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