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

Annotations already declare readOnlyHint=true and openWorldHint=true, so safety is covered. The description adds that results are 'current' and scoped to a single 'public' section, which is useful context, but says nothing about pagination, result counts, or freshness windows beyond the output schema.

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?

A single sentence that is fully front-loaded (verb+resource first, constraint second) with zero filler. Nothing could be removed without losing meaning.

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 one-parameter read tool with an output schema and readOnly/openWorld annotations, the description covers purpose, scope, and the prerequisite value source. The remaining gap is minor: no indication of result volume or pagination behavior.

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 single 'section' parameter already enumerates every valid slug inline, so the baseline is 3. The description's note that values must come from indianexpress_sections adds a modest dynamic-source hint but no format detail 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?

States a specific verb+resource ('Current The Indian Express headlines') and scopes it to 'one public section,' which cleanly distinguishes it from the sibling article/news/sections tools. An agent can tell without opening the schema that this returns a per-section headline list.

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?

Explicitly states the prerequisite that the section value must come from indianexpress_sections, which routes the agent to the right sibling before calling. It gives clear context but no explicit when-not or alternative-source guidance for headlines.

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