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

With no annotations, the description carries the full behavioral burden. It does not say whether this is a safe read, what happens when no previous tree exists, whether the comparison is over wallet balances or aggregate totals, or if there are rate/latency constraints. 'Compare' and the 'get' prefix imply read-only, but that is never stated.

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?

A single front-loaded sentence with zero padding; nothing redundant. It is arguably too terse for the behavioral gaps, but as a conciseness measure it is efficient.

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 zero-required-param read tool whose schema is fully documented, the definition is minimally workable. But with no output schema and no annotations, the description should explain what a 'cumulative tree' comparison returns and in what shape; that domain jargon is left unexplained.

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 100% — pool (enum LINK/POL, default LINK) and limit are fully documented in the schema. The description adds no parameter meaning beyond that, so the baseline 3 applies.

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 (compare) and a specific resource (latest Priority Pool cumulative tree vs the previous one), which distinguishes it from the plain sdl_get_priority_pool fetcher. It does not explicitly name sibling tools, so it falls short of a 5, but 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 implies usage — you call it when you want the delta between the last two snapshots rather than a single snapshot. However, it never states when to prefer this over sdl_get_priority_pool, sdl_get_priority_pool_distribution, or sdl_get_priority_pool_wallet, so guidance remains implicit.

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