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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so the safety profile is covered. The description usefully adds auth context ('same sign-in as get_my_vault') and discloses the aggregate nature of the data set — useful beyond the annotations, though it says nothing about cost or latency of assembling this multi-source rollup.

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?

One densely packed sentence with the resource front-loaded and the default and auth notes trailing. The enumerated content list runs long but every clause names a distinct returned field, so little is wasted.

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, the description must carry the return-value burden, and it does by enumerating the five content blocks. The main residual gap is the relationship to overlapping sibling tools, but for a single-optional-param read tool this is nearly complete.

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% and the month parameter's description already spells out 'current' / 'previous' / YYYY-MM within 12 months. The description only echoes the default ('This month so far by default'), adding nothing the schema doesn't already say. 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?

Opens with a specific verb-free but clear statement of the resource: 'Your month in the vault, for the wallet you signed in with', then enumerates the concrete contents (claims in units and USD, lock boost counts, ranking, badges, vault distributions). It distinguishes itself from get_my_claims and get_my_badges implicitly by being the aggregated recap rather than the raw list, though it never names those siblings.

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?

Only guidance given is the default window ('This month so far by default') and the auth hint ('same sign-in as get_my_vault'). There is no statement about when to prefer this recap over get_my_claims, get_my_badges, or get_monthly_reports, which all overlap in content — the agent must infer the routing.

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