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

Annotations already declare readOnlyHint=true, idempotentHint=true and destructiveHint=false, so the safety profile is covered structurally. The description still earns credit for adding two things annotations cannot express: an expected latency of ~10 minutes, and an explicit prompt-injection warning that 'What people asked' quotes UNTRUSTED public comments. It is held to 3 rather than higher because the latency note is buried in a parenthetical with no advice on long-running behavior.

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?

It is a single dense sentence that front-loads the report contents, with the security warning placed last as a self-contained clause. Nothing is redundant, though the trailing '(10 minutes)' is ambiguous — it reads as either generation latency or report-reading time — which slightly undercuts an otherwise tight structure.

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 no output schema, the description carries the full burden of explaining return contents, and it does that well by enumerating the sections plus the PDF download link. What is missing is the input side: how to obtain report_id and whether the call is slow enough to need waiting/retry strategy. For a simple single-parameter read tool this is adequate but visibly incomplete.

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?

There is one parameter, report_id, and schema description coverage is 0% — the schema supplies no type-level meaning beyond 'string'. The description never mentions the parameter at all, so it fails to compensate for the coverage gap, leaving the agent with no clue whether report_id is a slug, an integer, or must be fetched via list_reports.

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 enumerates exactly what a Monday report contains (per-network numbers, best/worst videos, audience questions, weekly plan learnings, next-week plan, PDF link), which is genuinely informative about the resource. However it is phrased as a noun phrase rather than a verb+resource statement, and it never distinguishes itself from the sibling list_reports, which an agent would also need to find report_id.

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?

There is no statement of when to call this versus list_reports, and no guidance on where report_id comes from — which is the single prerequisite for invoking the tool. The only usage-adjacent signal is the parenthetical '(10 minutes)', which implies a slow call but doesn't say what to do about it.

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