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

No annotations are provided, so the description carries the full burden and does well: it discloses the dual return shape (index of weeks vs. full detail), the ordering ('most recent first'), and the date-key format. It does not cover permissions, error behavior for a nonexistent week, or any rate limits, which keeps it 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?

Four tightly packed clauses, each carrying distinct information: purpose, no-date mode, with-date mode, and usage intent. The most decision-relevant fact (mode branching) is front-loaded immediately after the purpose statement, with no filler.

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 two-parameter read tool with no output schema and no annotations, the description covers both invocation modes, the date-key format, and the ordering of results. It leaves the shape of a 'full roundup detail' and the behavior on an invalid or nonexistent week unspecified, which is a minor but real gap.

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%, so both parameters are already documented in the schema, including the YYYY-MM-DD pattern and the 'omit to list available weeks' semantics. The description restates the date-mode behavior and pattern without adding format or constraint detail beyond the schema, matching 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 and resource ('Get BuildFeed's weekly roundup content') and then splits the tool's two distinct behaviors: index listing without a date vs. full week detail with one. This is unambiguous and clearly separable from siblings like get_stats, get_video, and list_videos, which serve different resources.

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 names the query types it serves ('what happened this week' or historical week-by-week summary questions), which is concrete when-to-use guidance. There are no sibling alternatives covering roundups, so no exclusions are needed, but it stops short of stating when this tool is the wrong choice.

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