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

Annotations already declare readOnlyHint=true, and the description builds on that by disclosing that no parameters are required, that it returns the most recent day's papers, and that outputs include an AI-generated hook and tags. It also clarifies the arXiv source and quantum computing scope, adding context beyond the annotations without contradicting them.

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?

Four sentences, each earning its place: the first states purpose, the second gives usage triggers, the third enumerates return fields, and the fourth directs to alternatives. Information is front-loaded and there is no redundancy.

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 simple read-only list tool with one optional parameter and no output schema, this description fully covers what the tool does, when to use it, what it returns (including field names), and how it relates to sibling tools. Nothing essential is missing.

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?

The input schema fully documents the single optional 'limit' parameter with type, default, min/max, and description (100% coverage). The description simply says 'no parameters needed', reinforcing that the parameter is optional but adding no new meaning beyond the schema.

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 opens with a specific verb and resource: 'Get today's quantum computing papers from arXiv', clearly stating both the action and the source. It also distinguishes itself from siblings by explicitly contrasting with searchPapers (date-range/topic-filtered) and getPaperDetails (specific paper).

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 provides explicit when-to-use triggers ('what's new in quantum computing?' or daily briefing) and names two alternatives with their exact purposes: searchPapers for date-range/topic-filtered search, and getPaperDetails for full abstract/analysis. This leaves no ambiguity about tool selection.

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