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

Annotations already cover the safety profile (readOnlyHint, openWorldHint), and the description adds real behavioral context: pagination must be sequential because no total count exists, and foreign sister-site cards are excluded from results. It does not describe rate limits or page-size behavior, so it falls short of a 5.

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 with no filler; the core action and result contents come first, and the pagination constraint follows. Every clause carries information.

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?

An output schema exists, so return values need not be described, and the description covers the key constraints an agent needs (1-based paging, sequential use, no total count, sister-site exclusion). It is complete enough for invocation, with only the sibling relationship left unaddressed.

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%, but the description adds meaning beyond the terse schema text: page values are 1-based, must be used sequentially, and cannot be bounded by a known total. That extra pagination semantics is genuinely useful, hence above the baseline 3.

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 (fetch), resource (NDTV-hosted live-blog cards), and scope (one page by 1-based page number), plus what each card contains. It clearly reads as a paginated list operation, but it never names the ndtv_live_blog sibling, so sibling differentiation is left implicit.

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?

Gives a usage instruction ('Use sequential page values') and explains why (no total count is exposed), which implies context. However, it never states when to choose this list tool over the singular ndtv_live_blog detail sibling or any alternative, leaving routing to inference.

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