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

Annotations already declare write/not-readonly, non-idempotent, non-destructive, so the safety profile is covered. The description adds useful context that it writes to the current workspace like mem_save and that the response reports which workspace. It does not disclose what happens on repeated saves given idempotentHint=false (duplicate notes?), which is the main remaining behavioral gap.

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?

Three compact sentences that front-load what the tool is and how it maps to mem_save, then the payload contents, then the workspace destination. Little waste, though the parenthetical field list is slightly dense.

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 7-parameter mutation with no output schema and zero schema descriptions, the description covers the core summary payload, session_id, and workspace behavior, so an agent can make a viable call. It is not complete: four scope/workspace parameters remain undefined and duplication semantics are unstated.

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 0% across 7 parameters, so the description must compensate and only partly does: it explains `summary` contents (objective, achievements, next steps, relevant files), marks `session_id` optional, and implies `scope` is repo/folder. The remaining root_path, git_remote, scope_name, and workspaceId are undocumented anywhere.

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 concrete verb and resource (save the end-of-session summary into scoped memory) and explicitly defines its implementation as a mem_save with type='note' and topic_key='session-summary'. This lets an agent distinguish it from mem_save and mem_context without opening either schema.

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?

Clearly frames the use case: end of session, to resume the thread next session. It also names the underlying sibling (mem_save) and explains the relationship, though it never states when to call mem_save directly instead of this specialization.

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