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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered without the description. The description adds one useful behavioral fact — that only *published* posts are returned (excluding drafts/scheduled) and that results are scoped to a period — but says nothing about pagination, rate limits, or empty-result 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?

A single front-loaded sentence with no filler; the key noun (published posts of a competitor) lands immediately. Minor deduction for the leading whitespace and the slightly redundant 'This tool is used to' preamble.

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 a full-coverage schema, an output schema, and annotations, the structured fields carry most of the burden, so the thin description is not fatal. Still, for a 7-parameter filtered-list tool the description omits any mention of default result size or the competitor_id prerequisite, leaving it merely adequate.

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%: pagination, type-per-channel enum mapping, limit capping, sort order, date formats and the competitor_id lookup hint are all documented in the schema itself. The description adds no parameter detail beyond the schema, so the baseline of 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?

States a specific verb ('get the published posts') and resource ('a competitor (tracked social media account)'), and adds a scope qualifier ('for the given period'). The parenthetical clarifies what a competitor is, which helps. However, it never names the near-identical sibling social_account_posts_list, so the agent must infer the competitor-vs-owned-account distinction on its own.

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?

The description only implies that a date range is needed ('for the given period') and gives no explicit when-to-use guidance, no prerequisites, and no mention of the sibling alternative social_account_posts_list. Nothing tells the agent when this tool is the right choice over listing its own account's posts.

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