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

Annotations already declare readOnlyHint=true, openWorldHint=false, destructiveHint=false, so the safety profile is covered. The description adds non-annotation context: the rendered card composition (image, dates, price, button) and the required search_shows chaining. The 'up to 8' limit merely restates the schema's maxItems, so it earns no extra credit.

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 sentences, both load-bearing, with the purpose front-loaded and the prerequisite instruction second. No filler or restated metadata.

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 single-parameter, read-only display tool with no output schema, the definition covers what is rendered and how to source input, which is enough for correct invocation. The main gap is not naming the accepted non-URL input formats, which the description could have surfaced given the low schema coverage.

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 reported at 0% for the property (only the array items carry a description), so the description bears more weight. It tells the agent to pass show URLs, but ignores the schema's accepted alternatives (slug or show name), leaving the parameter only partially explained outside the schema.

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 states a specific verb and resource ('Display up to 8 shows as cards') and even enumerates the card contents (image, dates, price, link button), so an agent understands this is a UI rendering tool, not a data query. It doesn't explicitly contrast itself with get_show or show_alert_link, but the 'cards' framing differentiates it adequately.

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?

It gives a clear prerequisite and ordering instruction: 'Call search_shows first and pass the URLs of the shows you want to show.' That routes the agent to the correct sibling for input gathering. No explicit when-not or alternative-rejection guidance, so it stops short of a 5.

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