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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety and locality are covered by structured data. The description adds useful framing that results are curated daily editions and that a date string of YYYY-MM-DD is matched against edition dates, but says nothing about permissions, result ordering, or what 'links' contains beyond the output schema. Modest added value on top of 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 sentences, front-loaded with the primary action and immediately followed by the mode-selection rule. Every clause earns its place; nothing is redundant with the title.

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-value detail is correctly left out, and the description covers both parameters' effects and the tool's scope. The only gap for a two-parameter read tool is routing: nothing tells the agent when to prefer this over get_news or search_articles.

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 both parameters are documented in the schema, including the 128-character cap, default of 10, and the 50 maximum. The description reinforces the optional-query semantics and the searchable fields but introduces no format or behavior the schema does not already carry, so 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?

The description names a specific verb and resource — searching/listing 'daily curated tech news editions' — and enumerates the returned fields (titles, domains, URLs, descriptions, dates). It doesn't explicitly separate the tool from siblings like get_news or search_articles, so an agent must infer the boundary, but the core purpose is unambiguous.

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?

It explicitly states the two operating modes: 'Omit query to list the latest editions, or pass a query to return matching editions and links.' That resolves the main usage decision without ambiguity. It falls short of 5 because no sibling tool is named as an alternative for the adjacent cases (fetching a single article, general article search).

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