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

With no annotations, the description carries the full burden, and it does disclose that this is a read-only GET operation and that results are 'live and scoped to them' (user-scoped data). It omits failure behavior (e.g. missing slug/404), auth requirements, and rate limits, so it goes beyond the bare minimum but not far.

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?

The operation is front-loaded, which is good, but the final clause ('Call it when the user asks for what it provides') is filler that takes space without adding meaning. The quoted title and parenthetical route are reasonable, but the sentence is not fully efficient.

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, no-output-schema, no-annotation read tool this covers the essentials: what it returns (blog-post, blog-category data) and that it is live/user-scoped. It lacks any note on what happens when the slug is absent or unknown, leaving a gap in an otherwise thin contract.

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 at 0% schema description coverage; the schema gives only type and maxLength. The description's 'by slug' implies the slug identifies the post but adds no format, lookup, or error semantics beyond that, so it barely compensates for the coverage gap.

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 names a specific verb and resource (GET /public/posts/:slug, 'Public blog post by slug'), so an agent knows it fetches a single post rather than a collection. It stops short of explicitly contrasting itself with the sibling endpoint-public-posts, so differentiation is only 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?

"Call it when the user asks for what it provides" is circular and gives no actionable trigger; it never names the alternative (endpoint-public-posts) or a condition that selects one over the other. Only the implied 'by slug vs list' distinction carries any routing value.

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