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emem, the verifiable memory protocol for the physical world

What tools exist here, and when to reach for each

emem_tools
Read-onlyIdempotent

The map of emem's tool surface, and the only tool you need to find the rest: the working loop in the order you walk it (name, ground, cite, resolve, verify, check for drift), then every other tool grouped by the question it answers, each with its one-line trigger. Pass name for one tool's full schema and a runnable example. IF YOU ARE READING A LIST OF 18 TOOLS, YOU ARE SEEING A CURATED SUBSET OF 114, NOT THE WHOLE SURFACE; hosts strip _meta, so the count is repeated here. Every catalogued tool stays callable by name through tools/call at either endpoint.

When to use: Call FIRST when you do not know which tool answers the question, or need a capability absent from your list: absent from the list is not absent from the server. q searches by topic (ndvi, flood, verify), name returns one exact schema, no arguments returns the whole map. /mcp/full registers the full catalog; emem_ask answers in one shot without picking a primitive.

Example arguments: {"q":"ndvi"}

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
qNoFree-text filter over tool names, titles and trigger text, e.g. `ndvi`, `cloud`, `flood`, `verify`, `token`. Plain lowercased substring over name + title + description + trigger text, not fuzzy and not stemmed: `ndvi` hits, `vegetation index` only hits tools that spell that phrase. Combines with `shape`/`bundle`/`category`/`tier` as AND, so an over-narrow combination answers with an empty catalog rather than an error.
nameNoReturn the full descriptor for exactly this tool (input schema, runnable example, annotations), e.g. `emem_ndvi`. Use this when you already know the name and want its schema without loading the whole catalog. It SHORT-CIRCUITS: when `name` is set every other argument here is ignored, so `{name, q}` is not a search within one tool. A name this responder does not carry is not an error status, you get a body with `did_you_mean` holding up to five names that share a substring with what you asked for.
tierNoWhich slice to list. Defaults to `all`, so this tool shows the whole surface even when the endpoint advertises only the core loop, and an `extended` tool you find here is callable by name through tools/call whether or not your host listed it. Pass `core` to see only what a default connection advertises.
shapeNoFilter by what the answer looks like, which is usually the real question. `scalar` is one number at one address; `raster` is a gridded field over an area; `timeseries` is a value per timestep; `vector` is a learned embedding; `identity` is a canonical name for a thing; `token` is a citation handle; `proof` checks one.
bundleNoFilter by the job you are doing. Call with no arguments first to see each bundle and its size.
categoryNoFilter to one category. This is about the shape of the job, NOT about safety: 16 tools outside `write` declare `readOnlyHint: false` because reading a cold address can materialise or mint as a side effect, so `category: "read"` is not a safe-tools filter. Read each result's `annotations.readOnlyHint` for that.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • changedInput schema / properties / category / description
      Previous value: -"Filter to one category. This is about the shape of the job, NOT about safety: 14 tools outside `write` declare `readOnlyHint: false` because reading a cold address can materialise or mint as a side effect, so `category: \"read\"` is not a safe-tools filter. Read each result's `annotations.readOnlyHint` for that."New value: +"Filter to one category. This is about the shape of the job, NOT about safety: 16 tools outside `write` declare `readOnlyHint: false` because reading a cold address can materialise or mint as a side effect, so `category: \"read\"` is not a safe-tools filter. Read each result's `annotations.readOnlyHint` for that."
  2. Changed1 schema field changed
    • changedInput schema / properties / category / description
      Previous value: -"Filter to one category. This is about the shape of the job, NOT about safety: 13 tools outside `write` declare `readOnlyHint: false` because reading a cold address can materialise or mint as a side effect, so `category: \"read\"` is not a safe-tools filter. Read each result's `annotations.readOnlyHint` for that."New value: +"Filter to one category. This is about the shape of the job, NOT about safety: 14 tools outside `write` declare `readOnlyHint: false` because reading a cold address can materialise or mint as a side effect, so `category: \"read\"` is not a safe-tools filter. Read each result's `annotations.readOnlyHint` for that."
  3. Changed4 schema fields changed
    • changedInput schema / properties / category / description
      Previous value: -"Filter to one category."New value: +"Filter to one category. This is about the shape of the job, NOT about safety: 13 tools outside `write` declare `readOnlyHint: false` because reading a cold address can materialise or mint as a side effect, so `category: \"read\"` is not a safe-tools filter. Read each result's `annotations.readOnlyHint` for that."
    • changedInput schema / properties / name / description
      Previous value: -"Return the full descriptor for exactly this tool (input schema, runnable example, annotations), e.g. `emem_ndvi`. Use this when you already know the name and want its schema without loading the whole catalog."New value: +"Return the full descriptor for exactly this tool (input schema, runnable example, annotations), e.g. `emem_ndvi`. Use this when you already know the name and want its schema without loading the whole catalog. It SHORT-CIRCUITS: when `name` is set every other argument here is ignored, so `{name, q}` is not a search within one tool. A name this responder does not carry is not an error status, you get a body with `did_you_mean` holding up to five names that share a substring with what you asked for."
    • changedInput schema / properties / q / description
      Previous value: -"Free-text filter over tool names, titles and trigger text, e.g. `ndvi`, `cloud`, `flood`, `verify`, `token`."New value: +"Free-text filter over tool names, titles and trigger text, e.g. `ndvi`, `cloud`, `flood`, `verify`, `token`. Plain lowercased substring over name + title + description + trigger text, not fuzzy and not stemmed: `ndvi` hits, `vegetation index` only hits tools that spell that phrase. Combines with `shape`/`bundle`/`category`/`tier` as AND, so an over-narrow combination answers with an empty catalog rather than an error."
    • changedInput schema / properties / tier / description
      Previous value: -"Which slice to list. Defaults to `all`, so this tool shows the whole surface even when the endpoint advertises only the core loop."New value: +"Which slice to list. Defaults to `all`, so this tool shows the whole surface even when the endpoint advertises only the core loop, and an `extended` tool you find here is callable by name through tools/call whether or not your host listed it. Pass `core` to see only what a default connection advertises."
  4. Added

TDQS

A4.9/5.0
Behavior5/5

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

Beyond the annotations, the description discloses that hosts strip `_meta`, that a visible list of 18 tools is only a curated subset of 114, that all catalogued tools remain callable via tools/call, and that `name` short-circuits other arguments. These are behavioral traits that the annotations alone do not convey. No contradiction with readOnlyHint, idempotentHint, or destructiveHint is present.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is long but densely packed and well structured: identity and role come first, then the working-loop ordering, grouping logic, retrieval behavior, and a dedicated "When to use" section. The all-caps subset warning and example arguments each carry operational information that is not redundant with the schema.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a zero-required-parameter introspection tool with a rich schema and no output schema, the description covers everything needed: no-arg behavior, q/name entry points, tier filtering, the return shape as a question-grouped map with one-line triggers, and the fallback path via tools/call. An agent can decide whether and how to call this tool without further information.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema already provides 100% descriptive coverage of all six parameters, so the baseline is 3. The description adds the no-arguments "whole map" behavior and a concrete runnable example ({"q":"ndvi"}), which are useful, but it does not need to compensate for a schema gap. It adds meaning without being the primary source of parameter understanding.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description names the tool as "the map of emem's tool surface" and "the only tool you need to find the rest," making its catalog-discovery role explicit. It also distinguishes itself from siblings such as emem_ask, which "answers in one shot without picking a primitive." This is a specific verb-plus-resource description, not a tautology or vague label.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

There is an explicit "When to use" block instructing the agent to call this tool FIRST when it does not know which tool answers or needs a capability absent from its current list. It also names alternatives: /mcp/full for registering the full catalog and emem_ask for one-shot answers, plus the `name` parameter for when the agent already knows the exact tool.

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

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