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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint=false, and destructiveHint=false, so the safety profile is covered. The description adds useful ordering ('newest first') and regional scope, but does not describe pagination behavior or what a returned khutbah includes.

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 definition is a single front-loaded sentence that packs resource, scope, ordering, and optional filters with no wasted wording. An agent can parse the key information immediately.

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 low-complexity, read-only list tool with full parameter schema coverage and safety annotations, the description covers the essential scope, ordering, and filters. It does not describe returned khutbah fields or pagination, but no output schema exists and the main call requirements are otherwise clear.

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%, so the schema already documents all three parameters. The description reinforces the topic and city filters but adds no meaning beyond the schema, such as matching semantics for query or path formatting for city; limit is not mentioned in the description at all.

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 resource (recent Friday khutbahs/sermons), geographic scope (US, Canada, Mexico), ordering (newest first), and optional filters. It is clear enough to distinguish from prayer-time tools by resource type, though it does not explicitly contrast with siblings like jumuah_times or masjids.

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?

Usage is implied through the optional topic and city filters, suggesting this is for browsing or searching sermons. However, there is no explicit when-to-use guidance versus alternatives such as jumuah_times or masjids, and no exclusions are stated.

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