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

Annotations already declare readOnly, idempotent, non-destructive, closed-world, so the safety profile is fully covered structurally. The description adds only 'Returns converted number', which is minimal; with the output schema present, little extra behavioral context is required, so a 3 is appropriate.

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?

Three short sentences, front-loaded with the core action and supported bases. No redundancy, though the trailing list_bundles pointer is tangential to invoking this 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?

For a low-complexity conversion tool with a 100%-covered schema and an output schema, the description is nearly sufficient. Its main gap is failing to differentiate from the near-duplicate sibling calculate_base_converter, which matters in this very crowded 'calculate_*' toolset.

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%, so the schema already documents value, from_base and to_base. The description merely restates the input names (value, from-base, to-base) without adding format constraints (e.g. valid digit sets per base or whether from_base/to_base are restricted to 2/8/10/16). Baseline 3 holds.

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 (convert) and resource (a number between bases) and enumerates the supported bases 2/8/10/16, which is concrete. However, it never distinguishes itself from the sibling 'calculate_base_converter', which sounds functionally identical, so an agent cannot disambiguate from the name alone.

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?

'Use for programming' gives a loose context but no when-not conditions and no explicit alternative selection. The only routing hint is a cross-reference to list_bundles, which is a discovery pointer rather than guidance on when this tool beats calculate_base_converter.

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