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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered elsewhere. The description adds nothing beyond that: no ordering guarantee, no pagination/continuation behavior, and no note on what happens when a bucket is empty or the prefix matches nothing.

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 no filler; the filter option is attached where it belongs. Nothing extraneous.

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?

A read-only listing tool with no output schema needs to tell the agent how the results are shaped and how to page past the 1000-key limit; neither is addressed. The description is minimally viable given the annotations, but leaves pagination and result format unspecified.

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%, with bucketId undocumented. The description reiterates the prefix filter (already described in the schema) but says nothing about limit, the default of 1000, or the maximum cap, so it only marginally compensates for the coverage gap.

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 and resource ('List objects in a bucket') with a scope qualifier (prefix filter). It is distinguishable from nexusai_bucket_list (buckets) and nexusai_bucket_file_download, though it never explicitly names the sibling it is not.

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?

There is no when-to-use or when-not-to-use guidance and no mention of alternatives among the many sibling tools. The only usage signal is the implied 'use prefix to narrow results,' which an agent could infer from the schema parameter anyway.

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