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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=true, so the safety profile is covered. Beyond restating that one entry is returned, the description adds no behavioral context such as 404/not-found behavior, id scoping (user/workspace), or auth requirements; the trailing REST path is a thin implementation note.

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 short fragments, fully front-loaded, with no filler. The second fragment (the raw GET path) is marginally useful for endpoint mapping but is the least load-bearing part of the text.

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-param read with rich annotations and complete schema coverage, this is close to sufficient. Because there is no output schema, the description could reasonably state what a returned entry contains (field shapes, nested task vs event), which it omits.

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% and there is a single parameter, so the schema carries the semantics and the baseline is 3. The description's 'by id' phrasing adds nothing beyond what the schema's 'Pipeline CRM calendar entry id' already states.

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 gives a specific verb+resource ('One calendar entry (task or event) by id') and clarifies that calendar entries can be either tasks or events, which is genuinely useful disambiguation. It is clearly distinguishable from list_calendar_entries, create_calendar_entry, and update_calendar_entry, though it never names those siblings.

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 only implied by the name and the 'by id' phrasing; there is no explicit when-to-use statement or pointer to pipelinecrm_list_calendar_entries as the way to obtain an id. For a simple id-lookup, implied usage is adequate but leaves the retrieval workflow unstated.

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