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

Annotations already flag destructiveHint=true, and the description meaningfully expands on this by stating exactly what is destroyed ('The others are removed') and how data is preserved (minutes added, notes joined, first entry kept). It stops short of noting non-idempotency or permissions, but adds real value beyond the annotations.

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?

Two tight sentences, no filler, and the key data-preservation behavior is front-loaded before the destructive consequence. Every clause earns its place.

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 an output schema present, return values need not be described, and the constraints, kept-entry rule, and destructive outcome are all covered. Only the absence of alternative-tool routing and non-idempotency detail keeps it slightly short of 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 coverage is 100% and the single parameter is fully documented, including the 2-20 range and the 'first one is kept' rule. The description largely restates the schema's own constraint ('same project, same day'), so it does not add notable meaning beyond the structured field.

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?

The description states a concrete verb (fold/merge) and resource (entries) plus the actual effect: minutes added, notes joined, first kept, others removed. This clearly distinguishes it from sibling delete_entry or update_entry, though it never names an alternative explicitly.

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 parenthetical constraint 'same project, same day' implies the scenario (collapsing duplicate entries) but there is no explicit when-to-use guidance or comparison against update_entry/delete_entry for cleaning up entries. Usage is inferable rather than stated.

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